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Newbie Spraying Polyurethane


maroto
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Last week I try to make what I belived was an improvement on the finish of the guitars I build, so I switch from Nitro to Poly. I tried a test make it brushed but after several coats had to buffer it and the shine was lower than the actual raw material (by the way I`m in Costa Rica so a lot of the brands and products mentioned on some forums are not available here). Then I bought a little re-touch spray gun as working with guitars are very small areas, then after about 4 coats the poly showed some pinholes, I decided to let it rest and see what would happen. WRONG!! :D I checked the guitar 24hours later and it was full of blisters and bubbles; like the face of a pizza teenage guy. If anyone can help me on any advise on the technique it would be welcomed.

Edited by maroto
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Last week I try to make what I belived was an improvement on the finish of the guitars I build, so I switch from Nitro to Poly. I tried a test make it brushed but after several coats had to buffer it and the shine was lower than the actual raw material (by the way I`m in Costa Rica so a lot of the brands and products mentioned on some forums are not available here). Then I bought a little re-touch spray gun as working with guitars are very small areas, then after about 4 coats the poly showed some pinholes, I decided to let it rest and see what would happen. WRONG!! :D I checked the guitar 24hours later and it was full of blisters and bubbles; like the face of a pizza teenage guy. If anyone can help me on any advise on the technique it would be welcomed.

What nozzle size and psi's are you running?

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