Our car rust remover is carefully blended with citric acid and disodium EDTA. Designed to soften rust layers without damaging metal bases. The method of use is very convenient: shake well before use, spray wine evenly in the rusty area. Let it sit for 5 minutes, then scrub with a brush. Rinse thoroughly with water and dry with wool. And can be adapted to common auto parts. Anti-spray nozzle design to prevent liquid dripping pollution body.