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#1
10-12-2017, 07:14 PM
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Repair a CF chip
Several years ago, I had a guitar fall off stage and the neck whacked the corner of the stage pretty hard and knocked a chip out.
How do I fix this? Bondo? Epoxy? Baking soda/super glue/sharpie? 
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Jeff Wall Singer, Songwriter, Storyteller http://www.bigdumbhick.com 1954 Martin D-18 CA Bluegrass Performer Art & Lutherie AmiCedar Parlor Big Muddy M2 Primitive Mandolin ....and a few other odds and ends 
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#2
10-12-2017, 08:31 PM
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It's hard to tell from that photo, but is that just a chip in the clearcoat, or does it impact the carbon fiber itself? It almost looks like it's just a chunk of poly that's missing. If that's the case, it's not necessary to repair, since the carbon fiber isn't in danger from being exposed. If you are trying to fill it in for "feel", so you don't run your hand over the chip all the time, then you can try the standard fill method of super glue or nail polish. Getting a "repair" on a poly finish can be tough, but it's up to you if you want to try.
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#3
10-12-2017, 10:48 PM
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If its just the poly, then it is some really thick poly, but I dont feel any fiber. Its been this way for at least 5 years or more, so I dont think the neck is gonna fall off, buts its about the same thickness as a .73 pick.
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Jeff Wall Singer, Songwriter, Storyteller http://www.bigdumbhick.com 1954 Martin D-18 CA Bluegrass Performer Art & Lutherie AmiCedar Parlor Big Muddy M2 Primitive Mandolin ....and a few other odds and ends
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#5
10-16-2017, 02:06 PM
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There's a lot of youtube videos about working with CF. This one might help you. It's about getting a bad CF finish to look great from a raw point. Since you need to fill that gap, this shows you how to get back to a high gloss finish. He covers how to use epoxy filler in it.
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#6
10-16-2017, 02:52 PM
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You might just glue the pick to the spot.
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#7
10-17-2017, 08:04 AM
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If it was me I would (1) carefully feather the edge out by sanding (maybe employ a dremel if it was thicker divot), this makes the edge less evident; wipe with solvent (2)then fill a little proud with a quality epoxy; it may need to be tinted if it was not a clear coat; (3) wash to remove epoxy blush after it cures; (4) sand/polish to make it flush and match the finish--if its satin it might be trickier.
If your not too sure about it you could take it to a good fiberglass person (boat or auto) who does this kind of thing all the time.
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