Concentrated blend of acids and detergents in this product tackles difficult jobs. MAD will remove rust, lime and scale from hard non-porous surfaces. Since it does not contain harsh sulfuric acids, it will not harm floors or drains. MAD is designed to remove soap scum and body oils from shower stalls, restroom floors, and swimming pools. This product is also formulated to remove water minerals and lime scale deposits from surfaces. This mild acid detergent cleans and brightens aluminum, magnesium, stainless steel, copper, and chrome. It can also be used to prepare steel or aluminum for painting.