<HTML><FONT FACE=arial,helvetica><FONT SIZE=2 PTSIZE=10>Greg, I'm sorry, I don't respond on this page often and keep forgetting that my identity doesn't automatically get posted.
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<BR>I am Loren Hedahl, reside in Silverdale, Washington, am a retired electrical engineer, became interested in rebuilding pianos several years ago compliments of a favorite son who acquired several a few years ago and deposited them . . . well, you get the picture, pianos everywhere kind of like weeds. Now that he's out of the picture working at a real job also as an electrical engineer, I have some options on how to dispose of these. I have chosen to rebuild most of them, whether to my financial advantage or not.
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<BR>The local Puget Sound Guild Chapter kindly allowed me into their group a little over a year ago. I'm sure I have been more of a deficit than an asset to them during this year and a half, however perhaps I can contribute a little now since I was recently elected to be their chapter secretary. Not quite sure what I'm getting myself into. I'll have to see if I can still spell and take notes.
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<BR>Concerning identifying an existing finish, try a little alcohol in a non-criical area. If it begins to disolve the finish it is probably shellac. If that doesn't work, try lacquer thinner. If that works, it is likely a lacquer. I found in my experimentation that lacquer thinner dissolves water borne lacquer readily also.
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<BR>When you get to the various varnishes and the cross-linked stuff like conversion lacquer or conversion varnish, two-part polyurethane clear coat, polyesther, etc., things get really dicey. Methylene chloride seems to work on almost everything.
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<BR>The problem is, have you ever met an elderly fellow in apparent good health that did auto or furniture refinishing for a living during all his working years? From what I've read none of the solvents are good for your health. Methylene chloride is about the worst. I've never heard of a piano that was worth more than my health, especially the clunkers in my back forty.
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<BR>So that is why I am perfectly happy to risk burning up or loosening the veneer with my heat gun to avoid contact with the strippers that are usually used. I am also working on a finishing method using locally procured water borne finishes. Actually this venture is very interesting and exciting to me. I also have a deep respect and appreciation for craftsmen who restore historically valuable instruments to their original glory and for those who make a living tuning pianos with nothing but a tuning fork, a wrench and some mutes.
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<BR>To get more familiar with wood finishing, you might like to check out some of the woodworker forums -- I like Sawmill Creek, but there are several others. The book I like best is "The New Wood Finishing Book" by Michael Dresdner, but again there are many others. Hope this answers your questions.
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<BR>Loren Hedahl</FONT></HTML>