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Re: Repair of '74 Martin D-18

Posted: Wed May 18, 2022 6:21 pm
by Barry Daniels
Pulled the popsicle brace and replaced it with a smaller maple plate and ready to glue the back on. The sides had moved a bit so I placed them in my enforcer jig then glued it up. I ran the body through my binding cutter to even up the ledge and took about 5 thou extra in both dimensions to get a clean edge. Sized the new binding on a MacRostie Binding Trimmer to get it exact size. Then I glued it in with Canopy Glue, which is a new (for me) glue that will allow bonding of plastic to wood using a water based glue. I am really excited to find this glue because it should help me in my search for that elusive binding replacement technique that doesn't require finish touchup.

Re: Repair of '74 Martin D-18

Posted: Wed May 18, 2022 6:34 pm
by Barry Daniels
Binding replacement is turning out better than I hoped. A bit of polishing should even out the deglossing of the finish.

One interesting thing about the Canopy glue is that it sets up in about 4-5 hours so that allows a cleanup of squeeze out with a damp rag before the glue is really hard. I may go around the edge of the binding and seal it with some GluBoost to deal with a few small gaps.

Re: Repair of '74 Martin D-18

Posted: Thu May 19, 2022 11:16 am
by Bob Gramann
Looking very good. I’m glad to hear that I’m not the only one whi has to deal with binding gaps. No matter what, I always find some.

Re: Repair of '74 Martin D-18

Posted: Tue Nov 22, 2022 5:50 pm
by Chris Vallillo
This is the first I've heard of a PMTE brace. I assume it's to stabilize the bridge plate area. Just what is it?

Re: Repair of '74 Martin D-18

Posted: Tue Nov 22, 2022 6:36 pm
by Barry Daniels
Yes, it strengthens the bridge plate laterally to minimize the dreaded hump that ultimately developed behind the bridge. I followed Mario's design where a center laminate of epoxy graphite was placed between layers of spruce to minimize wood creep over time.

Re: Repair of '74 Martin D-18

Posted: Tue Nov 22, 2022 6:46 pm
by Barry Daniels
It's kind of timely that you posted to this thread because I just finished this guitar last weekend and delivered it to my client. It turned out pretty good. The top was still ugly even after a refinish, but the tone was nothing short of amazing. One of the best I have heard, which I can only attribute to the braces getting scalloped.

Re: Repair of '74 Martin D-18

Posted: Fri Dec 02, 2022 8:02 am
by Clay Schaeffer
Fine looking job - your usual great work!
I like that jig you made to align the sides and back. I will have to copy it.

Re: Repair of '74 Martin D-18

Posted: Mon Jan 02, 2023 5:33 pm
by John Scime
That's some beautiful craftsmanship on the kerfed lining.

Re: Repair of '74 Martin D-18

Posted: Tue Jan 03, 2023 10:37 am
by Barry Daniels
Thanks.

Re: Repair of '74 Martin D-18

Posted: Mon Apr 17, 2023 6:24 pm
by Randy Davidson
Very nice work. I have a nice Harmony on my bench for an x-brace conversion. You gave me some ideas.