Most of the time as long as I have everything clean I don't worry about the staining, but when I do want to remove it from my cylinders I use a soft cloth buffing wheel on my bench grinder. In the frame I usually can get it with a nylon brush and barnes cleaner, I have heard of guys using store bought cleaners for stainless steel and one guy told me he used automotive polishing compound, but I don't know. I think those cleaners may be abrasive so if you were going to try it I would say take it easy at first.