Do not use Calcium, Lime and Rust Remover on any natural stone or marble (including cultured marble), terrazzo, colored grout (any other color than white), any painted, coated, sealed or metallic glazed surfaces, plastics, laminates, Formica, Corian, aluminum, galvanized metals, nickel, oil rubbed bronze, brass, copper, steam irons, leaded crystal, refinished tubs or any damaged or cracked surface. Calcium, Lime and Rust Remover may etch older sinks, tubs and tiles. Calcium, Lime and Rust Remover is corrosive. Avoid contact with wood, clothing, wallpaper and carpeting. Some laminated surfaces (counter tops) are coated with a synthetic surface which may be affected by rust removers; clean spills immediately. Always spot test first on an inconspicuous area.