Superior removal of rust, lime, hard water and mineral deposits. Mildly acidic, bleach-free. Removes tarnish, oxidation, grime and scuffs. Cleans, shines and restores stainless steel, copper, brass, ceramic, porcelain, chrome, fiberglass and other hard non-stone surfaces. Great for a variety of industrial applications, plus cookware, cutlery and deep-cleaning drained floors and grout. Clean surfaces in the bathroom and kitchen, to remove rust stains from garden tools and to remove mildew and dirt from vinyl siding. BKF Cleanser is safe for use on most surfaces, including porcelain.