Fred writes:
I don't think sanding sealer is less brittle and more flexible than lacquer. I would think the opposite if anything - more flex would mean more likelihood of gumming up sandpaper, and it doesn't. When it dries, in hammers, I think it is more likely to "break" because of discontinuity caused by the dust. That is how I have pictured it. If anyone has different information, I'd like to hear i
It is my experience that sanding sealer is much softer than lacquer. I remember a guitar refinisher that decided it would be easier to buff out a sealer finish than to shoot lacquer over it. The finish was so soft that it got scratched by anything that touched it.
I know that some lacqers are harder than others, and there is a line of finish, (Qualusol??) that was offered in different hardnesses. I'm not a chemist, so I don't know how the hardness is created.
Regards,
Ed Foote RPT
http://www.uk-piano.org/edfoote/index.html
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