The safer, acid free rust remover. Eastwood Rust Dissolver will penetrate deep into metal and remove rust within just a few hours. Leaves metal clean and ready to paint, plate or powder coat. Rust Dissolver is suitable for engine parts and will not harm copper, aluminum, brass, lead, solder, plastic, rubber, seals, wood or vinyl. Derust small parts in a plastic container and larger parts can be placed in the discharge stream of a commonly available small pump.