METAL DETOX pre-treatment spray 500 ml METAL DETOX pre-treatment spray 500 ml is a powerful and effective pre-treatment spray designed to remove stubborn metal stains and deposits from surfaces. It is formulated with a blend of powerful surfactants and chelating agents that quickly and effectively remove a variety of metal stains, including rust, copper, iron, zinc, and aluminum. The biodegradable formula is safe to use on a variety of surfaces, including aluminum, stainless steel, and fiberglass. It is easy to apply and can be used on both interior and exterior surfaces, making it an ideal pre-treatment for painting and refinishing projects.