This question was posed to me yesterday by the facility manager of a local community center: could a cracked soundboard be repaired by dripping CA into the crack (as is done with bridges)? My questions were: would CA hold up and would it help? I didn't know the answers to any of those, although I could hypothesize some. BTW, I told him NOT to try it, since both the pianos with cracked soundboards are Steinways: a 1950s B and a 1931 L that's been rebuilt and refinished. And nobody ever mentioned (or remembered) to think about humidity control. Harrumph! The cracks aren't horrid, but they are there. Thanks for any comments. Annie G.
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