Dear list, I am still wondering about this alcohol/water method for centerpins. I did try it, on one flange only, but it didn't work. Actually, I didn't expect it would, because of what I understood of the story of a man from Renner, Stuttgart. He told us, (so I thought) the alcohol/water solution works on bushings which have a graphite layer. In a humid climate, the graphite curdles, which results in a tight centerpin bushing. The alcohol solves and spreads the graphite again. I can't believe all bushings in the US have graphite layers, so my questions are: did I mistunderstand this story completely or does it work in a different way? What about this shrinking business? I can't remember the Rennerman said anything about that. But perhaps I forgot. Thanks in advance, Albertien de Pater, piano technician/tuner Amsterdam, Holland
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