A customer whose Yamaha GH-1 I haven't tuned in a number of years called, interested in having me tune it but much more interested in having the piano "cleaned." After some inquiry it sounds like she's most concerned about cleaning and polishing the case. My general understanding has been simply cleaning with a soft cotton rag is usually sufficient. The PTG Tech Bulletin on Finish Care says pretty much the same thing, though it recommends Meguiar's Mirror Glaze #17 Plastic Cleaner and #9 Swirl Remover to buff out any "hazy appearance caused by many fine scratches" in high use areas (eg music desk). The local auto parts supply only had the Show Car Glaze #7, Trim Detailer, and Cleaner Wax. Are any of these useful, or should I just save them for my car? Any advice from polyester care experts would be deeply appreciated. Patrick Draine
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