Star brite Rust Stain Remover - Easily Clean Corrosion Stains Off Fiberglass, Vinyl, Metal & Painted Surfaces The simple, effective way to remove rust stains Easy to use; spray on, rinse off No rubbing or scrubbing required Safe for use on fiberglass, vinyl, metal and painted surfaces Ideal for use on RVs and around the home to remove sprinkler rust stains