Dynabrade 90040 5-Inch Diameter Foam Flat Face Reattachable Hook-Face Backing Polishing Pad, Polishing/White, White White Foam: Polishing - foam cells are smaller and closer together than Yellow Foam cells making the action less aggressive Excellent for buffing and polishing fiberglass, plastics and other materials Can be used with sanding cremes for metal, fiberglass and composites Glazes can be applied for high glass after compounding Industrial-rated for tough production performance