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 Post subject: Guitar case repair
PostPosted: Thu Jul 18, 2019 11:40 pm 
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Joined: Sun Sep 08, 2013 11:39 pm
Posts: 140
About a year ago I posted a thread here about damage done to a Guardian guitar case when travelling by air. Air Canada quickly reimbursed me for the new cost of the case, but it was not that badly damaged (although it would have cost a lot to repair probably.) Having bought a replacement case, I decide to repair the damaged one for daily use. Photos follow. The impact cracked the side of the case, and split the bottom. I cut away most of the split bottom and squeezed glue into the remaining crack and clamped it. I used a piece of "mahogany" 1/4" plywood to fashion a replacement piece, butt joined it with glue, and glued in two cleats (made from an ice cream bar stick), cut with a 5/8" plug cutter, and glued into a shallow 5/8" recess cut with a forstner bit. The bottom splice was glued and brad nailed to the side. I looked long and hard for scraps of Tolex fabric to finish it but found none, so bought a one yard piece of 54" material; I now have enough for life. This i glued on using E6000 adhesive which I had on hand. I think the original adhesive might have been water-based contact cement, and I considered using that, but wanted more flexibility when pushing the back piece of Tolex in behind the original piece still on the side. I glued some and taped it to cure, then glued some more and taped it etc. It worked okay but you can see in the photo I need to clean that seam up. In the end I was pretty happy, and it is going to get beat up along the way some more, but it felt good to patch it up. I found very useful information here also: http://www.stevekirtley.org/caserepair.htm (Two more photos in a reply following this post.)

As an aside to this, I was interested to see the construction, which is advertised in this line of Guardian cases as 7-ply construction. The back clearly was only three-ply 1/4" material, and the sides were 1/2" or a little less, with 4 plies, in some places 5. So I wonder what the "5-ply" cases look like inside. But the case did protect the guitar from the impact.
Attachment:
original damage.jpg
Attachment:
Guitar case repair 2_resize.jpg
Attachment:
guitar case repair 3_resize.jpg


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 Post subject: Re: Guitar case repair
PostPosted: Thu Jul 18, 2019 11:46 pm 
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Joined: Sun Sep 08, 2013 11:39 pm
Posts: 140
Last two photos in the guitar case repair process:

Attachment:
guitar case repair 4_resize.jpg


Attachment:
guitar case repair 5_resize.jpg


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 Post subject: Re: Guitar case repair
PostPosted: Fri Jul 19, 2019 8:07 am 
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Joined: Fri Mar 03, 2006 7:09 pm
Posts: 5884
Location: Hegins, Pa
great job

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John Hall
Blues Creek Guitars Inc
Authorized CF Martin Repair Center
Board of Directors of Association of Stringed Instrument Artisans
http://www.bluescreekguitars.com


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 Post subject: Re: Guitar case repair
PostPosted: Fri Jul 19, 2019 3:07 pm 
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Joined: Sun Mar 09, 2014 8:13 pm
Posts: 1922
Very nice!


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 Post subject: Re: Guitar case repair
PostPosted: Fri Jul 19, 2019 9:20 pm 
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Joined: Thu May 24, 2012 8:03 am
Posts: 1096
Location: Chestertown Maryland
Looks great -what is that glue all about?

Ed Minch


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 Post subject: Re: Guitar case repair
PostPosted: Fri Jul 19, 2019 9:56 pm 
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Joined: Mon Jul 28, 2014 7:50 am
Posts: 666
Location: Chadds Ford, PA
Very nice repair! I occasionally pick up damaged cases from the local guitar factory and with a little repair effort they often look as good as new. My best example was a deep body 00 injection molded case that took a bit of fiberglass and new rivets, etc., and I ended up with what would have been an expensive and hard-to-find case for less than $20.


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 Post subject: Re: Guitar case repair
PostPosted: Sat Jul 20, 2019 12:51 am 
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Joined: Sun Sep 08, 2013 11:39 pm
Posts: 140
Ed, first, the wood repairs were done with TiteBond. The E6000 is something I bought to do a shoe repair (rubber to cork, and it has worked for that). It's a clear liquid/gel that says it bonds lots of things to lots of things. It's sometimes described as a "craft glue". So I would not count on it for high stresses without testing. But for gluing a fabric/vinyl product like Tolex to wood, I thought it might work. I think it stays a little flexible, so I thought it might bond well to the residue of what appeared to be a contact-type cement used originally. For the repair, I did not want to use a contact-type cement that would grab too quickly. The E6000 stays workable for perhaps ten minutes, so I had time to work edges under seams, and pull things tight with tape until it set. When it cures it seems a little like rubber cement. I masked some edges where I knew it would probably squeeze out, so I could wipe it off easily. I have not tried any solvent on it except naphtha (which cleaned up some smears) because I did not know what they might do to Tolex. In the web link I posted, author Steve Kirtley says he has also used white glue for gluing Tolex down.


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 Post subject: Re: Guitar case repair
PostPosted: Sun Jul 21, 2019 8:56 am 
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Joined: Wed Aug 13, 2014 12:14 pm
Posts: 1162
Maybe the case covering counts as a "ply" for advertising purposes.....

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When things are bad, try not to make them any worse, because it is quite likely they are bad enough already. - French Foreign Legion


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