I don't use perc mainly for reasons of toxicity and clearly the best solution is to chuck the parts. When I did try it, some years ago, it did free things up for awhile but I never followed up the piano. Recently I had a Steinway upright in which chucking the parts simply wasn't an option for this customer (at least for now) and all we could do was try to free up the action as best as possible so she could at least play it. Goose Juice seems to work the best and last the longest in my experience. Sometimes spending the client's money on the second best, even temporary, solution is necessary until such a time that the best solution can be considered. David Love davidlovepianos at comcast.net www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of BobDavis88 at aol.com Sent: Wednesday, November 29, 2006 10:12 PM To: pianotech at ptg.org Subject: Re: Steinway upright verdigris In a message dated 11/29/2006 8:47:16 PM Pacific Standard Time, davidlovepianos at comcast.net writes: Perchloroethylene (PERC or dry cleaning fluid) seems to work but it is considered a highly toxic substance. I have tried perchlorethylene (and many other solvents) by rinsing, soaking, blowing, and agitating in an ultrasonic cleaner. The centers 1) get looser 2) never feel right and 3) ALWAYS tighten back up. Sooner or later, but always. I no longer want to spend the client's money to combine effort with risk, and just chuck the parts. from Wikipedia: In the early 20th <http://en.wikipedia.org/wiki/20th_century> century, [perchlorethylene] was the most effective available treatment for hookworm <http://en.wikipedia.org/wiki/Hookworm> . [Mmm, tasty....] Bob Davis -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20061130/51e05802/attachment-0001.html
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