Collinite #920 Heavy Duty Fiberglass Cleaner. Removes film, black streaks, mild-moderate UV oxidation/chalkiness, discoloration and tough stains from fiberglass. Restores original color and gloss. Leaves a clean, smooth surface for a follow up wax. Improves wax bond, spread, coverage and durability. Easy to use. Can be applied by hand, DA and rotary. Not suitable for clear coat defects. 64 fl. oz.