Bio-Kleen Aluma Kleen is an aluminum and metal preparation and brightener for boats, RV and automobiles. A fast-acting formula that foams on contact, removing oxidation, stains and discoloration. Clean and deoxidize any aluminum or metal surface: pontoons, aluminum boats, running boards, step plates, diamond plate, metal tanks on trucks and RVs, metal trimming on trailers and RVs, rust from parts and tools. Cleans and removes brake dust and buildup from coated rims. Dilute 50:50 for an automotive acid wash: remove rust speckles and oxidation from paint, remove salt oxidation from exterior and thoroughly clean prior to waxing and polishing. Contains corrosion inhibitors to protect the aluminum surfaces of your boat, RV and trailer.