Puzzler: instant rust

[Cy Shuster]

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Did the customer shine up the strings, or spray with furniture polish?

--Cy Shuster--
Rochester, MN
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  From: Piannaman@aol.com=20

  I forgot to mention that I'd seen it in the showroom and done some =
prep on it at the house prior to making the most recent service call.  I =
did not see rust on the strings at the time. 
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