STEK Formula 09 Iron | Iron RemoverSTEK Formula Iron eliminates hard to remove iron deposits and brake dust, neutralizing any corrosive agents that could permanently damage your vehicles clear coat. Without proper care, these metal contaminants can leave behind heavy rust, cause sealants and ceramic coatings to fail pre maturely, and cause scratching during hand washes. This fast acting formula, which turns violet once the reaction is completed, is safe to use on wheels and painted