Sandblast / abrasive-blast etch is an appearance change on glass produced by propelled abrasive media (e.g., silica, aluminum oxide, garnet, glass bead, soda) that erodes the surface to create uniform or patterned matte/frosted fields. Presentations include full-field frosting, masked graphics, and stencil lettering. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status.

• Uniform matte/frosted fields with sharp boundaries at mask edges (letters, logos, bands).
• Texture is non-directional within the blasted area; contrast strongest at oblique/raking views and in reflection.
• May include overspray haze (faint halo) beyond the intended mask from stray media.

• Surface-catch class (MSRT)
• SC-2 typical across blasted fields (distinct interruption, granular feel).
• SC-1 at light/feathered work or overspray halos; SC-0 outside the worked area.
• Perform one light, non-marring pass on a small revealed test patch (substrate). Use a polymer stylus if a functional coating is suspected. MSRT supports classification only.
• Visual signature
• Uniform, non-directional frost within the field; abrupt transition edge at mask boundary (often visible as a clean line/ridge under raking).
• No chip-flank sparkle (not linear scoring); no fused nodules (not hot particle).
• Stipple/peen character may vary with media size—coarser media yields coarser frost.
• Viewing / lighting
• Evaluate clean & dry at 12 / 36 / 72 in, normal incidence and oblique sweep (~60°–120°); employ low-angle raking to show field uniformity and mask edges. Record distances/angles in-frame.
• Location / access
• Record pane ID and surface numbering (#1–#4; laminate-internal). Typically on exposed/accessible faces (#1 or #4). Between-pane by parallax on #2/#3 (e.g., pre-assembled interior face blasting in error) → CAT-5 by location.
• Mechanism cue (context)
• Evidence of stencil/mask residue lines, uniform grain across large areas, or documented decorative intent. Overspray often seen as faint halo beyond graphics.

• Assign CAT by visibility at acceptance geometry and MSRT after a reveal patch. Depth values are indicative—field measurement not required.
• CAT-2 (Light): Feathered/overspray halo only; SC-1 within halo; limited standard-view impact outside raking. Indicative relief: ~10–40 μm.
• CAT-3 (Moderate): Defined decorative/graphic blast with clear matte field legible at standard distance; SC-2 prevalent within field. Indicative relief: ~40–150 μm.
• CAT-4 (Severe): Full-field or deep decorative blast producing high-contrast frosting visible at standard and wide-field views; SC-2 throughout, occasionally with micro-pitting from coarse media. Indicative relief: ~150–400+ μm (local maxima dependent on media and dwell).
• Reclassify when: If the presentation is acid-etched (chemical) rather than abrasive → V.02.02 / Ch.01.02 per chemistry; if linear score lines with chip flanks dominate → M.01; if fused metallic peppering is present → Th.01.02.
• CAT-5 (by condition/location): Between panes/inaccessible by parallax, integrity indicators, or confirmed functional-coating loss on the surface to be worked → CAT-5.
• CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not abrade to “force” a response during classification.

• vs. Chemical etch (acid-cream / HF): Chemical etch often shows meniscus rings, runs, or brush/cream application texture; abrasive blast is uniformly stippled, bounded by mask-sharp edges, and granular to the touch (SC-2).
• vs. Eolian abrasion (E.02.01) / dust-storm micro-pitting (E.02.02): Environmental abrasion is directional or peppered with gradients; sandblast is intentional, bounded, and uniform within the field.
• vs. Coating anomalies (Co-family): Coating patchiness is planar on designated coated faces and lacks mask-sharp boundaries; blasting shows hard edges and granular catch.
• vs. Frosted decorative glass (P.03/P.04 design): Factory-produced frosted patterns may be acid-etched or ceramic, uniform without overspray halos; confirm manufacturing documentation vs field-applied blast (look for mask witness lines and edge halos).

1. Photo set (VIS): 12 / 36 / 72 in, normal + oblique; raking macros of field texture and mask edge; context frames of full graphic/field. Record distance/angle in-frame.
2. MSRT result (substrate): After a small reveal test patch, perform one light, non-marring pass in field and outside as control; record SC-class (SC-2 field, SC-0 control, SC-1 halo if present).
3. Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
4. Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e when the worked surface is a factory functional coating.

V.01.01 Sandblast / Abrasive-Blast Etch — Uniform frosted field with mask-sharp boundary on surface #___; post-reveal test patch shows SC-2 within field / SC-0 outside; visible at [12/36/72 in] under VIS geometry. Morphology: non-directional granular frost, overspray halo [Y/N], no fused nodules, no chip-flank score lines. Classification: CAT-[2/3/4] by visibility and SC-class; reclassify per notes if chemical etch indicators or environmental abrasion signatures dominate; CAT-5 if between-pane or coating-side loss on the surface to be worked. Forms + photo set attached; acceptance per VIS-A §6.

Scribed / engraved tool marks are appearance changes created by hard-point contact (carbide/steel points, diamonds, glass cutters, masonry nails, ceramic chips) drawn across the glass surface to inscribe letters, numbers, outlines, or linear tags. The action cuts and plows the surface, producing grooves with micro-chipping (chip flanks) and bright edge sparkle in raking light. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status.

• Discrete incised lines (often high-contrast at raking) forming alphanumerics, initials, simple icons, or linear tags.
• Entry/exit features: pick-in points, directional tearing, burred ends, feathered tails at flicks.
• Variable depth along strokes from pressure modulation; intersections show flaked nodes.

• Surface-catch class (MSRT)
• SC-2 along primary grooves (distinct interruption; granular edge feel).
• SC-1 at light passes/feathered tails; SC-0 outside the inscription.
• Perform one light, non-marring pass on a small revealed test patch (substrate). Use polymer stylus if a functional coating is suspected. MSRT supports classification only.
• Visual signature
• Continuous, directional grooves with chip-flank sparkle at oblique; micro-chipping more pronounced on outer (tensile) edge of curve strokes.
• No fused nodules (not hot particle); not uniform matte (not abrasive blast).
• Stroke rhythm reveals hand motion (speed changes, hesitations, overlaps).
• Viewing / lighting
• Evaluate clean & dry at 12 / 36 / 72 in, normal and oblique sweep (~60°–120°); use low-angle raking to catch edge sparkle and entry/exit morphology. Record distances/angles in-frame.
• Location / access
• Record pane ID and surface numbering (#1–#4; laminate-internal). Usually on exposed faces (#1 or #4). Between-pane by parallax on #2/#3 → CAT-5 by location.
• Mechanism cue (context)
• Presence/history of accessible public interface, hand reach, graffiti prevalence; sometimes co-present with paint tags (V.03.01) or acid tags (V.02.01).

• Assign CAT by visibility at acceptance geometry and MSRT after a reveal patch. Depth values are indicative—field measurement not required.
• CAT-2 (Light): Fine incised lines legible in raking, intermittent SC-1–SC-2, minimal impact at standard view; micro-chips sparse. Indicative relief: ~20–60 μm.
• CAT-3 (Moderate): Clearly legible strokes/letters at standard distance; consistent SC-2; chip flanks evident along runs and at intersections. Indicative relief: ~60–150 μm.
• CAT-4 (Severe): Bold, deep engraving and/or dense inscriptions visible at standard and wide-field; frequent micro-fracture islands, flaked nodes, occasional local divots. Indicative relief: ~150–350+ μm local maxima.
• Reclassify when: If the field is uniform matte within masked boundaries → V.01.01 abrasive blast; if cream/meniscus residue, runs, or brush texture present → V.02.02/Ch.01 acid etch; if linear scoring with long straight guides across panes → M.01.02 straightedge scoring rather than intentional inscription.
• CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators, or confirmed functional-coating loss on the surface to be worked → CAT-5.
• CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not abrade to “force” a response during classification.

• vs. Razor/scraper scoring (M.01.01): Scraper lines are often parallel, straight, construction-context, and may track cleaning paths; scribed vandalism shows alphanumerics/icons, variable depth, entry/exit features.
• vs. Acid-etch graffiti (V.02.01): Acid tags leave whitened, modeled micro-texture with flow/cream artifacts; scribed marks are cut grooves with chip-flank sparkle and tactile catch.
• vs. Fine abrasion swirls (M.02.01): Swirls are curvilinear fields lacking clear stroke intent, typically SC-1; scribing is deliberate strokework with SC-2 grooves.
• vs. Hot particle peppering (Th.01.02): Hot particle shows discrete pits/fused nodules; scribing presents continuous incisions.

1. Photo set (VIS): 12 / 36 / 72 in, normal + oblique; raking macros of chip flanks, entry/exit points, intersections; context frames showing reach/access. Record distance/angle in-frame.
2. MSRT result (substrate): After a small reveal test patch, perform one light, non-marring pass through stroke body and tail; record SC-class (SC-2 body, SC-1 tail, SC-0 control).
3. Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
4. Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e when the worked surface is a factory functional coating.

V.01.02 Scribed / Engraved Tool Marks — Incised alphanumerics/lines with chip-flank sparkle on surface #___; post-reveal test patch shows SC-2 along grooves / SC-1 at tails; visible at [12/36/72 in] under VIS geometry. Morphology: continuous grooves, entry/exit features, intersection flaking, no fused nodules, not a uniform matte field. Classification: CAT-[2/3/4] by visibility and SC-class; reclassify per notes if acid-etch/abrasive-blast/environmental abrasion criteria are met; CAT-5 if between-pane or coating-side loss on the surface to be worked. Forms + photo set attached; acceptance per VIS-A §6.

Acid-marker tagging is an appearance change produced by field-applied acidic agents (often HF-bearing gels/creams or “etch pens”) that chemically attack silica, creating whitened, matte micro-texture in letter/stroke geometry. Presentations include freehand tags, initials, and panel-fill scribbles; artifacts such as cream swirls, meniscus rims, runs/drips are common. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status.

• Chalk-white to pale grey etched strokes forming alphanumerics or symbols; soft edges compared to scribed grooves.
• Process artifacts: cream swirl patterning, brush/dauber texture, meniscus rings, and vertical run legs from over-application.
• Halo beyond strokes where thin film partially etched.

• Surface-catch class (MSRT)
• SC-2 across worked strokes (distinct interruption from etched micro-texture).
• SC-1 in feathered halos/thin film zones; SC-0 outside the affected area.
• Perform one light, non-marring pass on a small revealed test patch (substrate). Use a polymer stylus if a functional coating is suspected. MSRT supports classification only; do not abrade to “prove” relief.
• Visual signature
• Modeled, non-directional micro-texture (no chip-flank sparkle) with white/opaque appearance; swirl/cream tool marks within fills; runs with faint etched tails.
• No fused nodules (not hot particle); no continuous granular field (not abrasive blast); not a sharp incised groove (not scribed).
• Viewing / lighting
• Evaluate clean & dry at 12 / 36 / 72 in, normal and oblique sweep (~60°–120°); use low-angle raking to show meniscus rims, run legs, and modeled texture. Record distances/angles in-frame.
• Location / access
• Record pane ID and surface numbering (#1–#4; laminate-internal). Typically on public-facing exposed faces (#1 or #4). Between-pane evidence by parallax on #2/#3 → CAT-5 by location.
• Mechanism cue (context)
• Graffiti prevalence, tag clusters mixing paint and acid, ghost repeats at transit nodes; possible glove/cream residue on adjacent frames.

• Assign CAT by visibility at acceptance geometry and MSRT after a reveal patch. Depth values are indicative—field measurement not required.
• CAT-2 (Light): Thin, feathered acid film forming pale stroke ghosts; SC-1–SC-2 intermittently; minimal standard-view impact. Indicative relief: ~10–40 μm.
• CAT-3 (Moderate): Clearly legible etched strokes visible at standard distance, SC-2 consistent; meniscus rings/runs evident. Indicative relief: ~40–120 μm.
• CAT-4 (Severe): Bold, over-worked fills or re-etched layers producing strong whitening legible at standard and wide-field; SC-2 throughout, possible local undercut/roughness. Indicative relief: ~120–300+ μm local maxima dependent on exposure/dwell.
• Reclassify when: If strokes are incised with chip-flank sparkle → V.01.02 scribed/engraved; if field is uniform granular matte with mask-sharp edges → V.01.01 abrasive-blast; if residue is amber/oily without etch → R.04 family.
• CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators, or confirmed functional-coating loss on the surface to be worked → CAT-5.
• CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not abrade to “force” a response during classification.

• vs. Scribed grooves (V.01.02): Scribing shows sharp grooves with chip flanks and directional incision; acid-tags show whitened modeled texture, swirls, runs, and soft stroke edges.
• vs. Abrasive-blast (V.01.01): Blast fields are uniform within masks and granular; acid-tags show application artifacts (cream swirls/runs) and variable whiteness.
• vs. Mineral etch (Ch.03.03): Mineral etch forms halo rings and non-graphic fields tied to wetting; acid-tags form intentional stroke geometry with tool/cream patterns.
• vs. Coating anomalies (Co-family): Coating issues are planar on designated faces and lack runs/cream swirls; acid-tags are localized graphic events.

1. Photo set (VIS): 12 / 36 / 72 in, normal + oblique; raking macros of meniscus rims, swirl/brush patterns, run legs; overview of entire tag and context of public interface. Record distance/angle in-frame.
2. MSRT result (substrate): After a small reveal test patch, perform one light, non-marring pass through stroke body and halo; record SC-class (SC-2 body, SC-1 halo, SC-0 control).
3. Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
4. Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e when the worked surface is a factory functional coating.

V.02.01 Acid-Marker Tagging (HF-Bearing) — Whitened, modeled micro-texture with cream swirls/meniscus/runs forming [letters/symbol] on surface #___; post-reveal test patch shows SC-2 in stroke body / SC-1 in halo; visible at [12/36/72 in] under VIS geometry. Morphology: acid-etched strokes, application artifacts, no chip-flank sparkle. Classification: CAT-[2/3/4] by visibility and SC-class; reclassify per notes if scribed/blast/mineral criteria dominate; CAT-5 if between-pane or coating-side loss on the surface to be worked. Forms + photo set attached; acceptance per VIS-A §6.

• Etch-cream patterning is an appearance change created by consumer or contractor-grade etching creams/gels (commonly fluorides/acidic bases intended for glass/ceramics). Application by brush, dauber, sponge, or finger yields patchy white/milky micro-texture with tool-mark swirls, pooling at edges, and drip legs if over-applied. Presentations include filled rectangles, stenciled bands, hand-applied patches, or attempted “frost effect.”
• Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status.

• Opaque to semi-opaque white/milky fields; non-uniform density with brush/dauber arcs and cross-hatch where re-worked.
• Meniscus rims at stencil edges; pooled, brighter islands where cream collected; occasional vertical drips below the field.
• Stencil witness lines from vinyl/mask; finger smudges or glove prints in thin zones.

• Surface-catch class (MSRT)
• SC-2 across worked micro-textured fields (distinct interruption).
• SC-1 in feathered halos/thin film; SC-0 outside the treated area.
• Perform one light, non-marring pass on a small revealed test patch (substrate). Use polymer stylus if a functional coating is suspected. MSRT supports classification only; do not abrade to “prove” relief.
• Visual signature
• Modeled, non-directional micro-texture with application artifacts: brush arcs, dabs, swirls, pooling meniscus rims; whitened opacity proportional to dwell/re-application.
• No chip-flank sparkle (not scribed); no uniform granular blast field (not abrasive blast); no fused nodules (not hot particle).
• Viewing / lighting
• Evaluate clean & dry at 12 / 36 / 72 in, normal incidence and oblique sweep (~60°–120°); use low-angle raking to emphasize swirls, rims, and density variation. Record distances/angles in-frame.
• Location / access
• Record pane ID and surface numbering (#1–#4; laminate-internal). Typically on exposed faces (#1 or #4). Between-pane identification by parallax on #2/#3 → CAT-5 by location.
• Mechanism cue (context)
• Craft/decor attempts, privacy “frosting”, ad-hoc graffiti removal gone wrong, or vandalism; masking materials (vinyl, tape) and residual adhesive may be nearby.

• Assign CAT by visibility at acceptance geometry and MSRT after a reveal patch. Depth values are indicative—field measurement not required.
• CAT-2 (Light): Thin cream haze with SC-1–SC-2 intermittent, faint swirls, limited standard-view impact. Indicative relief: ~10–40 μm.
• CAT-3 (Moderate): Clearly legible etched panels/bands visible at standard distance; SC-2 consistent; swirl/meniscus artifacts evident. Indicative relief: ~40–120 μm.
• CAT-4 (Severe): Dense, re-worked fills with strong whitening, multiple passes, runs/pools; visible at standard and wide-field; SC-2 throughout. Indicative relief: ~120–300+ μm local maxima (chemistry/dwell dependent).
• Reclassify when: Sharp grooves with chip-flank sparkle → V.01.02 scribed; uniform mask-bounded granular frost → V.01.01 abrasive blast; white/grey ringed halos from water chemistry → Ch.03 mineral system.
• CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators, or confirmed functional-coating loss on the surface to be worked → CAT-5.
• CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not abrade to “force” a response during classification.

• vs. Acid-marker tagging (V.02.01): Markers form stroke geometry with run legs; creams form area fills/panels with brush/dauber swirls and meniscus pooling.
• vs. Abrasive blast (V.01.01): Blast is uniform within masks, granular to touch; creams are modeled/mottled, show swirls and variable opacity.
• vs. Mineral etch (Ch.03.03): Mineral etch follows wetting/drip geometry with crystalline rings; cream fields have application geometry and tool marks.
• vs. Factory acid-etched/frosted glass (P.04): Factory finishes are uniform and documented; field cream leaves swirl artifacts and edge pools; seek product docs.

1. Photo set (VIS): 12 / 36 / 72 in, normal + oblique; raking macros highlighting swirls, meniscus rims, density variation; overview of full treated area. Record distance/angle in-frame.
2. MSRT result (substrate): After a small reveal test patch, perform one light, non-marring pass within field and outside; record SC-class (SC-2 field, SC-1 feather, SC-0 control).
3. Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
4. Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e when the worked surface is a factory functional coating.

V.02.02 Etch-Cream Patterning — Milky etched panel with brush/dauber swirls and meniscus rims on surface #___; post-reveal test patch shows SC-2 in field / SC-1 in halo; visible at [12/36/72 in] under VIS geometry. Morphology: modeled chemical micro-texture, pooling islands, no chip-flank sparkle, not a uniform blast frost. Classification: CAT-[2/3/4] by visibility and SC-class; reclassify per notes if scribed/blast/mineral criteria dominate; CAT-5 if between-pane or coating-side loss on the surface to be worked. Forms + photo set attached; acceptance per VIS-A §6.

Spray paint / marker coatings are appearance changes caused by deliberate application of paints or inks (aerosol lacquer/acrylic/alkyd, enamel, permanent markers, paint pens) onto the glass surface, producing opaque or semi-opaque films, stenciled fills, or freehand tags. The applied medium sits atop the glass and, absent prior abrasive attempts, does not alter the substrate. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status.

• Spray paint: Opaque color panels, feathered overspray halos, sag drips, spatter at start/stop; stencil witness edges where masking used.
• Marker/paint pen: High-contrast strokes, felt-tip or valve-pen stroke edges, pump-dot blobs, ink pooling at stroke overlaps; colors black, silver, white, neon.
• Multi-layer tags (marker over paint, or vice-versa) common in high-traffic zones.

• Surface-catch class (MSRT)
• SC-0 for intact film-on-top (paint/ink is exogenous).
• SC-1 only where a prior abrasive attempt created very shallow substrate micro-texture beneath residual film edges. SC-2 implies misclassification—consider V.01.02 scribed or V.02 acid-etch.
• Perform one light, non-marring pass on a small revealed test patch (substrate). Use polymer stylus if a functional coating is suspected. MSRT supports classification only; do not abrade to “prove” relief.
• Visual signature
• Film continuity with edge meniscus; no chip-flank sparkle, no granular frost, no pits.
• Overspray feather (fine particulate halo) around sprayed fields; drip legs vertical from heavy passes; marker stroke texture reveals felt/valve chatter.
• Viewing / lighting
• Evaluate clean & dry at 12 / 36 / 72 in, normal and oblique sweep (~60°–120°); raking highlights film thickness variation, overspray, drips, and stroke edges. Record distances/angles in-frame.
• Location / access
• Record pane ID and surface numbering (#1–#4; laminate-internal). Typically on public-facing exposed faces (#1 or #4). Between-pane by parallax on #2/#3 (rare; usually pre-assembly contamination) → CAT-5 by location.
• Mechanism cue (context)
• Transit nodes, storefronts, hand-reach corridors, co-presence of paint caps, markers, stickers; multiple tags in cluster; historic tagging visible on adjacent substrates.

• Assign CAT by visibility at acceptance geometry and MSRT after a true film-lift test on a contained patch (without abrading substrate). Depth values are indicative—field measurement not required.
• CAT-1 (Benign / non-relief): Thin paint/ink film or overspray legible mainly at angle/raking; SC-0; film lifts on test patch leaving no shadow. Indicative relief: 0–10 μm (optical film only).
• CAT-2 (Light): Heavier film with minor drip/overlap thickness; SC-0 (substrate unaltered). If a faint post-lift tone remains from prolonged dwell of solvent-rich inks, record SC-0/SC-1 localized. Indicative relief: ~10–40 μm (film stack).
• CAT-3 (Moderate): Opaque painted panels/tags readily visible at standard distance, with drips/sags and overspray halos; substrate still SC-0 after lift. Indicative relief: ~40–120 μm (film stack).
• Reclassify when: After true film lift, if modeled matte persists (SC-1/2) → assess V.02 (acid-etch) or M.02 (abrasion); if chip-flank sparkle present → V.01.02 scribed; if uniform granular frost within masked outlines → V.01.01 abrasive blast.
• CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators, or confirmed functional-coating loss on the surface to be worked → CAT-5.
• CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not abrade to “force” a response during classification.

• vs. Acid-marker (V.02.01) / etch-cream (V.02.02): Those leave substrate micro-texture (SC-2) with whitened etched appearance, runs/cream swirls. Paint/marker is film-on-top (SC-0) with color opacity and overspray/stroke artifacts.
• vs. Scribed grooves (V.01.02): Scribing shows sharp grooves, chip flanks, SC-2; paint shows meniscus edges, drips, no groove.
• vs. Coating anomalies (Co family): Coating issues are planar, on designated coated faces, and do not present overspray drifts/drips; paint/marker shows application geometry.
• vs. Oily films (R.04.03/04): Oily films are transparent/iridescent and track air paths; paint/marker is opaque/semi-opaque with clear application edges.

1. Photo set (VIS): 12 / 36 / 72 in, normal + oblique; raking macros of overspray, drips/sags, stroke edges; overviews showing extent and access context. Record distance/angle in-frame.
2. MSRT result (substrate): After a small true film-lift test patch (no abrasion), perform one light, non-marring pass on substrate and adjacent control; record SC-class (SC-0 substrate, SC-0 control; SC-1 localized only if prior abrasion evident).
3. Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
4. Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e when the worked surface is a factory functional coating.

V.03.01 Spray Paint / Marker Coatings — Opaque/semi-opaque film with overspray/drips or felt-tip stroke geometry on surface #___; true film-lift test patch confirms SC-0 substrate; visible at [12/36/72 in] under VIS geometry. Morphology: meniscus edges, feathered overspray, drip legs / pump-dots, no chip-flank sparkle, no granular frost. Classification: CAT-[1/2/3] by visibility and film mass; reclassify per notes if substrate etch/abrasion signatures are present; CAT-5 if between-pane or coating-side loss on the surface to be worked. Forms + photo set attached; acceptance per VIS-A §6.

Sticker/poster adhesive campaigns are appearance changes from affixed labels, posters, and vinyls applied to glass, leaving adhesive films, paper fiber ghosts, and outline “shadows.” Multi-layer campaigns may build heterogeneous films with edge dirt rims. The materials are exogenous; absent abrasive attempts, the substrate remains unaltered. Classification is appearance-only per VIS (method-agnostic). Inspect after Non-Invasive Reveal under VIS lighting/geometry; record surface numbering and worked-surface status.

• Rectangular/silhouette outlines matching posters/decals; paper fiber remnants and adhesive smear within boundaries.
• Grid-print ghosts from release-liner pattern; number/letter halos from die-cut vinyl.
• Edge dirt rims and finger pull tabs at corners; layered campaigns produce patchwork density.

• Surface-catch class (MSRT)
• SC-0 for film-on-top adhesive and paper fibers.
• SC-1 localized only where prior scraping or entrained grit produced very shallow micro-texture; SC-2 indicates misclassification—consider M.01.01 scraper scoring or M.02 abrasion fields if grooves/swirl remain.
• Perform one light, non-marring pass on a small revealed test patch (substrate). Use polymer stylus if a functional coating is suspected. MSRT supports classification only.
• Visual signature
• Translucent/tacky film with lint/paper fibers; matte haze in adhesive-rich zones; clean glass islands where stickers didn’t cover.
• No chip-flank sparkle, no granular frost, no fused pits.
• Viewing / lighting
• Evaluate clean & dry at 12 / 36 / 72 in, normal and oblique sweep (~60°–120°); raking shows adhesive smear flow, fiber orientation, edge rims. Record distances/angles in-frame.
• Location / access
• Record pane ID and surface numbering (#1–#4; laminate-internal). Common on public-facing exposed faces (#1/#4), transit/storefront zones. Between-pane by parallax on #2/#3 (rare historic trapping) → CAT-5 by location.
• Mechanism cue (context)
• Campaign layering (multiple outlines), retail/venue postings, permit decals, event stickers; co-evidence: torn paper, tape residues, plasticizer bleed from vinyl.

• Assign CAT by visibility at acceptance geometry and MSRT after a true residue-lift test on a contained patch (without abrading substrate). Depth values are indicative—field measurement not required.
• CAT-1 (Benign / non-relief): Thin adhesive film/fiber ghosts legible mainly at angle/raking; SC-0; lifts clean on test patch leaving no shadow. Indicative relief: 0–10 μm (optical film only).
• CAT-2 (Light): Heavier, aged adhesive with paper fiber loading and edge dirt rims; SC-0 with localized SC-1 where prior scraping/grit affected substrate; limited standard-view impact. Indicative relief: ~10–40 μm (film stack).
• CAT-3 (Moderate): Large multi-layer campaign fields readily visible at standard distance as matte veils/patchwork; substrate generally SC-0 after proper lift; note SC-1 localized if prior abrasive attempts present. Indicative relief: ~40–120 μm (film stack).
• Reclassify when: After true residue lift, if linear grooves with chip-flank sparkle remain → M.01.01 scraper scoring; if modeled matte/swirl remains → M.02 abrasion fields; if oily transparent film without fibers dominates → R.04.03 HVAC oil / R.04.04 kitchen grease; if plasticizer haze with wetting halo dominates near PVC → R.05.02 plasticizer smear.
• CAT-5 (by condition/location): Between-pane/inaccessible by parallax, integrity indicators, or confirmed functional-coating loss on the surface to be worked → CAT-5.
• CAT is appearance-based; acceptance is separate under VIS-A at 12/36/72 in. Do not abrade to “force” a response during classification.

• vs. Paint/marker coatings (V.03.01): Paint shows color opacity, overspray, drips; sticker campaigns show clear/whitish adhesive film, paper fibers, silhouette outlines.
• vs. Acid/cream etch (V.02): Etch presents whitened substrate micro-texture (SC-2) with swirls/runs; adhesive residue is film-on-top (SC-0) and lifts with proper reveal.
• vs. Surfactant/detergent film (R.04.01): Surfactant films show iridescent wipe trails; adhesive shows tacky, fiber-loaded mats, silhouette edges.
• vs. Plasticizer migration (R.05.02): Plasticizer films are oily/clear, align with PVC contact zones; sticker campaigns produce rectilinear poster shapes, paper fiber ghosts.

1. Photo set (VIS): 12 / 36 / 72 in, normal + oblique; raking macros of fiber-laden zones, edge dirt rims, silhouette corners, liner grid ghosts; overviews showing extent and multi-layer history. Record distance/angle in-frame.
2. MSRT result (substrate): After a small true residue-lift test patch (no abrasion), perform one light, non-marring pass on substrate and adjacent control; record SC-class (SC-0 substrate, SC-0 control; SC-1 localized only if prior abrasion evident).
3. Forms: Pane ID; product family & surface numbering; worked surface Y/N; functional coating present on worked surface? (Y/N/Unknown); reveal status; lighting/time; geometry checklist; photos attached.
4. Acceptance split: Post-restoration acceptance per VIS-A §6; classification ≠ acceptance. Coated-face appearance rules apply per VIS §6.2.e when the worked surface is a factory functional coating.

V.03.02 Sticker / Poster Adhesive Campaigns — Rectilinear silhouettes with adhesive film and paper fiber ghosts on surface #___; true residue-lift test patch confirms SC-0 substrate (SC-1 localized only where prior scraping evident); visible at [12/36/72 in] under VIS geometry. Morphology: tacky translucent film, fiber matting, edge dirt rims, liner grid ghosts, no chip-flank sparkle, no granular frost. Classification: CAT-[1/2/3] by visibility and film mass; reclassify per notes if substrate etch/abrasion signatures persist; CAT-5 if between-pane or coating-side loss on the surface to be worked. Forms + photo set attached; acceptance per VIS-A §6.