Bar Keeper's Friend Spray and Foam Multi-Purpose Cleaner 25.4 oz. Removes mineral deposits, oily residues, rust stains, and everyday grime from most hard, non-porous surfaces. Quick, easy and effective unique dual-option trigger allows product to spray or foam, plus it works upside-down! Formulated with a blend of mild acids (oxalic and citric) and superior detergents, it can be used on a broad range of acid-resistant surfaces, including sinks, shower stalls, toilet bowls and urinals, grout, ceramic tile walls and floors, drinking fountains, locker rooms and many other surfaces. Much better for stainless steel than cleaners containing bleach.