Hi - The brass logo badges on my 3a speakers are in need of polishing, but I'm not sure what the best way to go about that would be. I'm thinking maybe #000 steel wool or Scotchbrite, but I don't want to erase the paint or damage the finish. The model number and logo is etched in, but I have seen them with the red paint missing in the past and I want to avoid that if possible. Has anyone ever done this or are there any suggestions? Any help much appreciated! Matt