Most replacement sheet metal parts come with this coating. Here is information about the coating "EDP= Electro-deposit primer, which is a method of attaching primer to bare steel by electrically charging it. This process has been tested in 500 hours of salt spray with no corrosive effects. The only surface preparation required is scuffing of surface for better paint adhesion before painting. These parts are protected from rust as long as EDP coating remains under the paint."