TotalBoat Rust Primer (Gallon) Rust remover Primer converts rust into an inert substance, stopping rust in its tracks Phosphoric acid-based metal treatment ideal for rusted cars, bikes, boat trailers, and other metal surfaces Use it on both rusted or new metal. Using it on new metal ensures superior paint adhesion Water-thin formula provides coverage of over 500 sq. ft. per gallon Available in both quart and gallon sizes