Richard Jernigan -> RE: Do fabric in the guitar case react with shellac? (Sep. 27 2018 22:49:16)
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I had the rosewood pegs on my '67 Ramirez blanca replaced with machines. The work was done by Kenny Hill's shop in Ben Lomond, California, up in the Santa Cruz mountains south of San Francisco. I was passing through, so the guitar was returned to me within 2 or 3 days. The guitar was kept in a Mark Leaf case in those days, which captured the headstock with padding on the back and front. A day or two after I got the guitar back I noticed a cloth impression on the front of the headstock, not serious, but visible up close. The guitar was finished in catalyzed polyurethane at the Ramirez shop when it was built. I don't know what Hill's shop used for touchup after the machine slots were cut. Whatever it was, it apparently was not fully cured when the instrument was put back in the case. The guitar was more than 35 years old at the time, and I don't plan ever to sell it, so I wasn't concerned. Some time over the last several years, the cloth impression has disappeared. I don't know when, because I didn't pay much attention to it. The polyurethane on the rest of the instrument has thinnned out considerably over the 51-year life of the guitar, presumably due to continued cross-linking of the polymer, maybe due to some continued outgassing of volatile compounds. At any rate, the cloth impression on the headstock has disappeared altogether: (the ding near the 3rd string roller is due to whacking the guitar against something...) RNJ
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