On the last 4 guitars I built I used CA as a pore filler and it works like a charm. I know some turners use it for a finish and I have seen some discussion of it being used as a finish on guitars in the past. My guess is that it probably would work though I don't think you can get a high gloss out of it. And it's not been time tested and proven either. So even if you do test panels and love how it looks it's not known what it might look like say ten years from now. Unless I'm mistaken and this is already out there in the wild.
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