Metal Glo Polishing Paste Cleans, Polishes, Protects Metal Glo is a premium quality polishing paste which removes oxidation, tarnish, surface rust, water spots, tars and oils and leave a brilliant protective coating that last for months. Great For: Knives, Jewelry, Guns, Cookware, Silverware, Automobiles, Boats. Works on: Brass, silver, gold, chrome, copper, nickel, stainless steel, pewter, porcelain, fiberglass, Plexiglas, hard plastics and painted surfaces.