Rob, I can certainly understand the mystery to such an event. I have often encountered such stains on bass strings on newer and older vertical pianos from time to time and have not a clue as to the origin, so much so, that I don't pay much attention anymore. With the stain going complete around the monochords kind of eliminates contamination from an actual person. The rodent possibility Conrad mentions certainly is a possibility, but seems to be negated as to other areas of the bass strings not being contaminated as well. Hopefully, someone on the list actually has some input to this phenomena. Perhaps the tone is at least unaffected, and it is only an appearance issue for the customer's sake. Keith On Oct 19, 2009, at 1:31 PM, Rob Mitchell wrote: > The customer's concern is that at a minimum, this diminishes the > resale value of her piano and at worst, might be something that > would accelerate string wear/breakage. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20091019/7c063dea/attachment.htm>
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