I have a friend that has his 5000 resurfaced to a new unblemished condition. This is no small feat requiring removing, sending to S Calif. machinist and having the work done. You could find someone local, but the metal worker that did the 5000 has owned a Micro Seiki 5000 and done a couple. He is a super model maker and craftsman. I don't know what he charges but it would not be cheap or fast. If you're interested, email me for his name and number. (No other affiliation except that I've purchased his products.)
Having owned several Micro Seiki tables I can't imagine why anyone would like the aluminum platters better than the gunmetal. The aluminum platter needs the CU180 copper mat to reduce ringing. If the "silver" platter that was discussed was stainless steel, then that's another matter!