Hey everyone! Old trumpet player here but haven't played on a regular basis for a long time, so am looking forward to playing again. So glad I found TrumpetMaster.com ! I have an old (early 1970's) Yamaha YTR-232-S. It's in great shape but the finish is tarnished. Want to make sure I know the best way to polish it, so can someone share the best way to know for sure if there is a lacquer or plate finish? Many thanks!