Rust-Oleum Rust Dissolver Jelly. Specially formulated water-based product designed to dissolve and remove rust and oxidation on a variety of surfaces. It is suitable for use on iron, steel, aluminum, chrome, galvanized metal, porcelain, tile, fiberglass, glass, auto cooling systems and firearms. Apply by brush or as a bath. Clings to iron, steel and other metals to make rust removal convenient, fast and effective.