Rustproofing is the process whereby the rate at which objects made of iron and/or steel begin to rust is reduced. (In the long term it can't be stopped unless the rustproofing is periodically renewed.) The term is particularly used for the automobile industry. Application There are two ways in which rustproofing can be applied: In the factory In the factory, car bodies have chemicals, typically (phosphates), applied often using electrically charged systems so that layers of protection are added… (More on Rustproofing)