Paul asked: "An older Baldwin concert grand that I tuned recently has really grimy ivories.? I was thinking of polishing them with bar polish (Schaff No. 425) and a buffing wheel on my bench grinder, however I have heard that using a grinder with RPMs that are too high can burn the ivory.? What speed is safe, and what is the best buffing wheel to use? Thanks," Paul, 1725 RPM w/6" to 8" wheels. Use two buffing wheels. One, that "cuts" (the grime/scratches). And the other that has a "polishing" compound, to give it luster. There is lots of information regarding buffers in the Jewelry Supply Literature. Regards, Joe Joe Garrett, R.P.T. Captain of the Tool Police Squares R I
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