Size:3-Pack Flitz aluminum pre-clean industrial strength is a natural organic salts formula that will instantly remove heavy tarnish without rubbing. This product is safer than traditional acid-based cleaners. Just spray and rinse. It’s for use indoors and outdoors. It can be used on glass, aluminum, painted surfaces, fiberglass, stucco, brick, porcelain, brass and copper. In addition, it works great on heavy tarnish, rust and corrosion, calcium deposits and stains, heavy oxidation, water spots and stains.