Safe for acrylics, glass and plastics Final step during a professional windshield repairFinishing touch for windshield repair Removes scrape marks left by razor blades from the surface of cured resin Finishing touch for windshield repair Finished rock chip repair will have a nicer finish if buffed with Pit Polish and Pit Polishing Cork. Superior quality polish is safe for all acrylics, plastics, glass and glass repair resin. Provides the finishing touch to all windshield and plate glass repairs. Removes scrape marks left by razor blade from the surface of cured resin.