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#1
10-22-2023, 11:55 AM
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Deep gouge in Martin DM top
Hi all! I was standing with my guitar on, turned quickly in response to a sound in the other room, and put a serious gouge in the top of my beautiful Martin
I didn’t touch it for months, but last week I used steam followed by 1000-grit sandpaper and made more progress than I was expecting. Now I need to finish the job and am wondering if thin CA glue will work to fill the deepest/worst part and then I can blend the finish together. I’ve done a few finish repairs with CA glue followed by sanding and polishing, but never on an acoustic guitar. Would appreciate any tips especially on whether the CA glue will darken the wood in a good way to match the surrounding wood, and/or if I should use something else for the repair. I was also going to using shellac to blend in the satin finish but I really don’t know. Hopefully you can see the photos but I might have to work on that  Thanks!! https://drive.google.com/file/d/1vZe...ew?usp=sharing https://drive.google.com/file/d/1oz9...ew?usp=sharing Last edited by seandco; 10-22-2023 at 12:17 PM. 
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#2
10-22-2023, 02:15 PM
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a thought - - warning - - never had this problem
Your Martin has a nitrocellulose finish. I think it's better practice to use materials compatible with nitro, like Duco cement, to fill low-ish areas. Spruce won't be pleased if it's flooded with CA. While it will take a good long time (weeks!) for any Duco buildup to more-or-less stop shrinking, the spruce won't object. This is not a fix-today-done-tomorrow problem.
In general I try to use finish materials that are chemically related, and that rules out CA. Making structural repairs is different.
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#3
10-22-2023, 07:07 PM
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One problem with superglue on spruce tops is that it can stain the top especially if the wood has been bruised from an impact, best to try and fill the void with nitro itself.
if you can only get nitro in a spray can, then spray some into a cup to dissolve out most of the thinners and then use a small tip like edge of a paintbrush etc to pic the nitro up and put it into the void
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Cole Clark Fat Lady Gretsch Electromatic Martin CEO7 Maton Messiah Taylor 814CE
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