I've just polished mine up. They look almost new. I will post a pic but can't for another week. Actually this time I got a friend to do it for me (just spinning too many played these days! Otherwise I'd have done it myself).
Of course a lot depends on what condition they're in to start with but if you can live without them for a week my mate will happily polish them (he'll want some dosh though). I can pm you his contact details if your interested.
Cheers