I also applied the Meguiar’s to it and have been playing it. I think it will be okay with more waxing. However, the gold color is compromised, I think by the fact that I applied to gold paint over the original blue color. In retrospect, I probably should have used a white primer. But it still looks good, much better than the original blue. Do you think there’s anything to be said for waxing the original finish of some melodicas?