Starbrite Rust Stain RemoverThis Starbrite Rust Stain Remover is the simple and easy way to remove rust drip strains and sprinkler rust deposits. It is the best way to eliminate rust stains from boats, RVS, exterior walls of homes or wherever else they may form. This formula begins working on contact, dissolving the oxidation that causes these stains. Rust Stain Remover is easy to use and doesn't require any heavy scrubbing.Features: Removes Rust Drip Stains and Sprinkler Rust Deposits; No Rubbing Or Scrubbing Required; Contains No Harsh Acids; Specially Formulated For Marine and RV Use; Ideal For Removing Sprinkler Stains; Easy To Use Spray On Formula; Safe For Use On Fiberglass, Metal and Painted Surfaces; Great For Cleaning Corrosion Stains Cause By Metal Hardware, Nuts, Bolts and Other Marine Fittings; How to Use Starbrite Rust Stain Remover Spray Starbrite Rust Stain Remover directly on surface to be treated.; Let product work until stain is gone.; Rinse with fresh water.; Deep stains may require a second application and light scrubbing.; Avoid contact with fabric.;