> > It is my understanding from a class given by Chris Robinson on soundboards > > that conversion varnish creates the best vapor seal. Have you had any > > experience with it, if so why have you not mentioned conversion varnish as a > > possibility? Is it actually a polyester? > > No, I've not used conversion varnish. I've looked at it as a finish > material for piano casework, but have not yet taken the plunge. > > It is not a polyester. Different chemistry, but I'd have to look it up > to tell you more. Right. From my recollection, it's a catalyzed alkyd. I used it on cabinet parts - never got around to using it on soundboards, but I think it would be fine. Nice product to work with. It actually flows better initially, but sets up quicker than lacquer. Cool smell too, kind of like walnuts. I quit using it simply because customers preferred nitro lacquer in side by side comparisons. The promises of improved durability didn't seem to carry much weight. I guess they thought of their pianos as musical instrument more than furniture. Mark Story, RPT Eastern Washington University mstory@ewu.edu
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