Our metal rust removal spray is carefully formulated with citric acid and sodium gluconate. Specifically designed for penetrating rust layers and disintegrating structures it can dissolve various types of rust within minutes clean dark stains restore the original texture of metals and reduce the accumulation of subsequent impurities. The usage method is extremely convenient: 1. Shake the product well before use spray it directly onto the rusted area and then brush it back and forth with a brush. After the rust has been removed just wipe the surface clean at last. Moreover it can form an invisible protective film to isolate corrosive substances extend the rust prevention period of metals has a mild formula that does not corrode is compatible with various metals and maintains the stability of the base material structure.