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. One bottle covers about 250-500 sq ft. 16 fl. oz.