Remove rust stains without rubbing!An easy way to remove rust stains from corroded hardware fittings and screws. Spray on stain, let it work, then rinse. Safe for fiberglass, metal and painted surfaces.22oz. spray.Key featuresFast, easy and safe for fiberglass, metal, or painted surfacesSpray it on and rust stains disappearNo rubbing or scrubbing requiredClean corrosion stains caused by metal hardware, nuts, bolts and other marine fittings