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Rosewood Back Seam Seperating

Posted: Sun Dec 30, 2018 2:44 pm
by Kbore
I'm wet sanding, and it appears that the back joint, near the tail end, is opening up. I can feel the seam with my fingernail. Have no idea what to do about it. Advise? It's nitrocellulose lacquer finish, 12 coats.

Re: Rosewood Back Seam During Prep

Posted: Sun Dec 30, 2018 4:16 pm
by tippie53
is it open or glue shrink?

Re: Rosewood Back Seam During Prep

Posted: Sun Dec 30, 2018 7:26 pm
by Kbore
tippie53 wrote:is it open or glue shrink?
Looks and feels open. I can feel it with my fingernail, and it has liqueur slurry in it. The back was glued at least a year and a half ago. How would I tell if glue shrink?

Re: Rosewood Back Seam During Prep

Posted: Sun Dec 30, 2018 9:12 pm
by tippie53
if it is cracked you can press your thumb on one side and feel it move
I think you have glue sink . Did you use a filler?

Re: Rosewood Back Seam During Prep

Posted: Sun Dec 30, 2018 9:15 pm
by Kbore
tippie53 wrote:if it is cracked you can press your thumb on one side and feel it move
I think you have glue sink . Did you use a filler?
I did use use filler, Aqua Coat over Behlen vinyl sealer. Aqua Coat about 5 filling sessions.

Re: Rosewood Back Seam During Prep

Posted: Sun Dec 30, 2018 10:04 pm
by tippie53
good
check that it is an open crack use naphtha and see if it wicks into the wood that you can see it from inside.