Regarding verdigris, Often I find verdegris on the ends of center pins that are bound by the bushing cloth. The cloth itself is impregnated with the stuff, and new pins (I tend to replace with German silver pins) will corrode. This happens on new (Korean & Chinese pianos) as well as the venerable S&S grands. My solution is change the cloth, either through new flanges or tedious re-bushing. It seems that the cloth is usually the culprit. I've never seen vertigris on pins in teflon flanges, for example. Regards, Rob Kiddell RPT Edmonton, Alberta, Canada atonal@planet.eon.net
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