Crusader Posted June 28, 2020 Author Report Share Posted June 28, 2020 18 hours ago, Bizman62 said: The more liable culprit is that the moisture gets into the wood from the sides of the holes....... Good point, also seeing as the other guitar didn't have cracks until I cut f-holes in it "Its those f-holes gosh darn it, they're the cause of my misery!" Quote Link to comment Share on other sites More sharing options...
guitar2005 Posted September 8, 2020 Report Share Posted September 8, 2020 I've had this happen around volume controls. I think its a combination of water and pressure while wet sanding and buffing. I've fixed this with lacquer thinner on the cracks, applied a few times, let re-cure for a week then re-spray another coat and fill in the areas where the cracks were. 1 Quote Link to comment Share on other sites More sharing options...
Crusader Posted September 11, 2020 Author Report Share Posted September 11, 2020 On 9/8/2020 at 9:08 PM, guitar2005 said: I've had this happen around volume controls... I wish I had the patience to do that Quote Link to comment Share on other sites More sharing options...
komodo Posted September 22, 2020 Report Share Posted September 22, 2020 Adding to the post-mortem - Thoughts based on the guitar I was building where we both had the same issues at the same time: - Cracks only on the top which was hard maple (actually I did have a very small crack or two on the back around the control cavity). - Sprayed very heavy, and probably not enough time between coats. - cracks were mostly around holes, though not all. Some were on the top carve and were at an angle. I had three small ones parallel to each other, but not perpendicular to the carve or parallel. These imply curing stress cracks to me. - Cracks definitely developed after wet sanding, but some also appeared later when dry sanding but not as many. - When I enlarged the cracks to apply solvent, the finish seemed to lift at the edges of the cracks which could be adhesion problems. - No solvent worked on the cracks except the Cellusolve. (tried thinner, thinner mixtures, blush remover) - The frequency of the cracks slowed over time, and eventually stopped. My conclusions are: - wet sanding was an issue - too thick of layers was an issue, especially earlier layers. - I'm questioning moisture content of the maple because of possible adhesion and movement issues - Cracking occurred as the clear coats cured, curing took a long time because of the thickness, and was exacerbated by maple moisture content. Quote Link to comment Share on other sites More sharing options...
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