<<I tuned a 35 year old Steinway M yesterday that had this greenish-blue growth on five or six of the agraffes If I would have had my protek with me I would have lubricated the area. Was that a good idea? I don't think it would have made a big difference, it seems to have far more effect on the underfelt of the middle section. >>Was that stuff verdigris? (I thought it only grew on action centers). Yes, and you may find it on the keyblock plates, too. >>Is this a common occurrence? Not on agraffes, I think something was spilled on them, feeding a chemical reaction, >>Will that stuff clog the agraffe holes again and cause a call-back? What should I have done?>> I think you did no harm, but a slicker approach has me thinking of a small bronze brush, with the hose of a small vaccuum cleaner right there, so that you could take the mess away from the string holes, the agraffe, the piano, and ultimately, the house; but functionally, you made it work without doing any harm. Some string movement, within limits, could just about clean the mating surfaces, and a Q-tip with some lacquer thinner or acetone to flush the rest of the verdigris out would have, I think, ended the problem. Regards, Ed Foote RPT
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