Starbrite - Rust Stain Remover - 1 Gallon - 89200Starbrite Rust Stain Remover 1 Gallon 89200 Rust Stain Remover is the best way to eliminate unsightly rust stains from boats, RVs, exterior walls of homes or wherever else they may form. The formula begins working on contact, dissolving the oxidation that causes these stains. Easy to use; spray directly onto stained area and rinse off; no heavy scrubbing needed. Features: Size 1 Gallon Easy to use spray on formula. No rubbing or scrubbing required.