Our Car Rust Remover Spray contains citric acid sodium carbonate and disodium EDTA. It can quickly react with the corrosion of the metal surface effectively remove the rust layer restore the smoothness of the metal surface and form a strong protective film on the metal surface effectively isolate the air and moisture prevent the metal from rusting again and extend the service life. The way to use it is simple: clean and dry the areas that need to be removed spray the rusty area directly with a spray let the spray dip into the rusty area wipe the surface clean and reuse until all the rust is removed. It can efficiently remove rust quickly restore metal luster provide lasting protection for future corrosion enhance metal durability and extend service life.