Rust remover and Pre-primer - It Etches metal and leaves a Zinc Phosphate coating. Water based non-toxic, non-flammable, non-caustic and non-corrosive.
USAGES: Removes rust by dissolving it. Etches metal to provide a better surface. The metal is left ready to paint. It promotes better paint adhesion. Improves welding conductivity. Removes rust stains from non-metallic surfaces - porcelain, ceramic, fiberglass. PPC Metal Ready is not a long term rust killer. It is preparation of metal to a surface for paint. It will hold a metal surface for about 2 weeks before it will need painting.
Keep it wet for 20-30min. for it to work. Wash off (water) and dry well. It will leave a salt and pepper, some orange patches look, with a little white powder. You're good to go.