Sometimes it pays to open your mouth - I just got a free, 100% working Beocenter 9500, complete with BL1000 remote from my mother in law, who had "forgotten" it under her bed for a few years. She didn't quite understand why I was so enthusiastic about this "old piece of junk" that doesn't even play MP3:s... 
In any case, the metal panels on top of it are scratched. A couple of the scratches seem fairly deep. I'm very familiar with polishing metal to mirror finish, having done that to a number of aluminum and stainless steel items, but now I have to ask for help before I screw things up. I tried the search feature for ideas and techniques, but nothing useful came up.
How should I proceed? All tips and hints are very welcome - including "buy new panels" if nothing else helps. Someone must have done this before.