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Unknown finish
http://luthiersforum.com/forum/viewtopic.php?f=10101&t=57699
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Author:  SkinnyJim [ Mon May 11, 2026 8:35 pm ]
Post subject:  Unknown finish

Unknown finish. I need to know how to use nitro over an unknown finish.Ican try wiping laquer thinner or mineral spirits and get an idea of what I’m up against
I was hoping shellac or maybe vinyl sealer then nitro.Of course there is always a complete strip job which is no fun Any suggestions are appreciated.
Skinnyjim

Author:  dofthesea [ Tue May 12, 2026 9:03 am ]
Post subject:  Re: Unknown finish

Is this electric or acoustic? Anywhere you can do a test that isn't visible? Be sure and do a shellac wash coat in between any finishes that are incompatible.

Author:  SkinnyJim [ Tue May 12, 2026 6:21 pm ]
Post subject:  Re: Unknown finish

It’s acoustic I’m thinking it polyurethane I’ll test it tommorrow

Author:  SkinnyJim [ Thu May 14, 2026 2:03 pm ]
Post subject:  Re: Unknown finish

Pretty sure it’s polyurethane.maybe a coat of vinyl sealer or shellac. Then nitro.Not 100% sure

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