Rust-Oleum® Stops Rust® Cold Galvanizing Spray provides maximum corrosion resistance through galvanic protection. Use for touch-up and repair to damaged galvanized steel, galvanized ducts, fences, gutters, trucks, trailers, and more. Do not topcoat with an alkyd finish. Cold Galvanizing Spray contains 93% zinc in the dry film with cathodic protection, which resists rusts, scratches and chips.