Our car tire rust removal spray contains citric acid, EDTA disodium, and sodium gluconate. It can form a protective film to prevent rust re-generation and extend the lifespan of the tires. The usage method is very simple: clean and dry the metal surface, evenly spray the rust remover onto the metal surface of the tire about 10-15 centimeters away from the surface, wait for 5-10 minutes, wipe off the dirt with a sponge, rinse with clean water, and wipe off the excess detergent with a towel. It can also quickly break down rust and restore the metallic luster of the tire.