Marykate Cleaner/Restorer Liquid 1 Quart

Marykate on & Off Hull & Bottom Cleaner 32oz

Works instantly to remove the toughest waterline stains, algae stains, and rust, gas exhaust stains. Use on fiberglass only.
Easy to apply - just brush it on and rinse off
Not for use on metal or painted surfaces
Will not harm the gel coat, emulsion