I use a rust remover from the marine hardware store similar to naval jelly. I think it is a mild solution of phosphoric acid, but I'm not sure. It gives sort of an antique gray look, which is good for most of my applications, but if you are going for the high polish look, probably not. The advantage this stuff gives is that you can recoat if you get any dark spots forming and it will clean them up without affecting the existing finish.