I am considering installing these factory hubcaps on my steel wheels for my GTX. I have a complete set of four. Two of the caps are in excellent condition. But two of the caps (pic 2 and 3) have pitting or blemishes (or whatever that is) on them. Does anyone have any recommendations on how to best remove these imperfections? Would a dremel do more harm than good? Simply scrubbing them with soap and water did nothing. Any advice would be appreciated. Thanks.