Progressively reducing treatment intensity toward the perimeter of a work area so the surface profile and finish merge gradually into untreated glass.

GlassRenu · Educational illustration
Meaning and boundaries
Feathering is not merely polishing a larger area and cannot guarantee that a deep localized removal will be optically invisible.
Why it matters in glass restoration
It targets visible rings, abrupt slope changes, residual haze, and edge banding around a restoration.
Related terms
References
- GlassRenu — How To: Remove Glass-on-Glass Scratch Damage
Publisher’s original source - GlassRenu — Cleaning Abrasives Process Sheet
Publisher’s original source - NASA — Handbook for Recommended Material Removal Processes for Advanced Ceramic Test Specimens and Components
Publisher’s original source - NASA Technical Reports Server — Cylindrical Optic Polishing Dwell Time Optimization
Publisher’s original source