A concentrated blend of acids and detergents, this product tackles the really tough jobs. It will remove rust, lime and scale from any rust stained surface and all metals. Since it does not contain harsh sulfuric acids, it will not harm floors or drains. Designed to remove soap scum and body oils from shower stalls, restroom floors and swimming pools, this product is formulated to also remove water minerals and lime scale. This mild acid detergents cleans and brightens aluminum and magnesium, stainless steel, copper and chrome. It can also be used to prepare steel or aluminum for painting.