LOL...stainless steel...I presume you are talking about the original wheel...that would be chrome plated steel, so just use whatever metal polish you would use on other chrome. There weren't a lot of consumer products (other than cookware/flatware etc.) that were stainless in '66. Of course, if it's not original, it could be stainless, but not likely if it has rust specks. Having said that, depending on the grade of stainless...it could pit/rust if say it got road salt on it, etc. But I give it about zero chance of being factory stainless back then.