<html> <head> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 10 (filtered)"> <style>  </style> </head> <body bgcolor=white lang=EN-US link=blue vlink=blue> <div class=Section1> 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.      <div> David Love davidlovepianos@comcast.net www.davidlovepianos.com </div> -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of BobDavis88@aol.com Sent: Wednesday, November 29, 2006 10:12 PM To: pianotech@ptg.org Subject: Re: Steinway upright verdigris   <div> <div> In a message dated 11/29/2006 8:47:16 PM Pacific Standard Time, davidlovepianos@comcast.net writes: </div> <blockquote style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt; margin-left:3.75pt;margin-top:5.0pt;margin-bottom:5.0pt'> Perchloroethylene (PERC or dry cleaning fluid) seems to work but it is considered a highly toxic substance.  </blockquote> </div> <div> I have tried perchlorethylene (and many other solvents) by rinsing, soaking, blowing, and agitating in an ultrasonic cleaner. The centers </div> <div> 1) get looser </div> <div> 2) never feel right and </div> <div> 3) ALWAYS tighten back up. Sooner or later, but always. </div> <div>   </div> <div> I no longer want to spend the client's money to combine effort with risk, and just chuck the parts. </div> <div>   </div> <div> from Wikipedia:  In the early <a href="http://en.wikipedia.org/wiki/20th_century" title="20th century">20th century</a>, [perchlorethylene] was the most effective available treatment for <a href="http://en.wikipedia.org/wiki/Hookworm" title=Hookworm>hookworm</a>.  [Mmm, tasty....] </div> <div>   </div> <div> Bob Davis </div> <div>   </div> </div> </body> </html>