Patrick, I typed Rock Tumbler Used into Google and came up with some possibilities. Maybe a similar search for crushed walnut shells or similar would get you some abrasive. Tom Cole Allied PianoCraft wrote: > If you own a rock polisher, I would put the pin in there, with some > walnut media. That will clean them with no labor. > > Al Guecia > AlliedPianoCraft.com <http://AlliedPianoCraft.com> > High Point, NC > > On Aug 19, 2010, at 11:21 AM, "Patrick C. Poulson" > <pcpoulson at sbcglobal.net <mailto:pcpoulson at sbcglobal.net>> wrote: > >> Good Morning: I am restringing a Wegman upright which has a metal pin >> block and uses specially made tuning pins. I will have to reuse these >> pins, and unfortunately they are all coated with 100 years of crud. >> Is there a recommended solvent of some sort that will restore them to >> a passable condition? >> Thanks, >> Patrick C. Poulson >> Registered Piano Technician >> 530-265-1983
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