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| Spraying help/suggestins please. http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=39487 |
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| Author: | Colin North [ Mon Feb 25, 2013 5:15 am ] |
| Post subject: | Spraying help/suggestins please. |
I'm having a problem spraying a guitar for the first time. Fuji XPC gun, 3 stage turbine, using water -based urethane lacquer (Enduro-Var Gloss, thinned 5% with water) Settings are 1 turn open on the gun, fully open on the air valve - using the no 3 (1 mm) nozzle and tip. Holding the gun about 5/6 inches away from the surface (I've done several coats so far in sets of 3, leaving overnight, sanding level, then spraying with ethanol/water before another 3 coats of lacquer) 3 coats on the top dry to about 1 thou thick overnight, before leveling. Spraying the sides and especially the neck, I'm getting a nice surface finish, glossy off the gun, very little "orange peel". However, on the front and back, the lacquer is not self-leveling so well, and comes out much rougher. It appears to dry more grainy than orange peelly (I think) Everything I'm doing is much the same, only the size of the surface I'm spraying is larger It's been similar all the coats. I'm beginning to feel I'm sanding off 2/3rds of the thickness just to level it! Any suggestions? |
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| Author: | B. Howard [ Mon Feb 25, 2013 5:21 am ] |
| Post subject: | Re: Spraying help/suggestins please. |
Sounds like you may be getting some dry spray on the large surfaces. Try less air, or more fluid and a faster pass. This is not happening on the smaller areas because they are smaller than the spray pattern. |
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| Author: | klooker [ Mon Feb 25, 2013 7:02 am ] |
| Post subject: | Re: Spraying help/suggestins please. |
I've only sprayed Nitro through my Fuji setup but I always have to choke down the air valve that's on the end of the hose. Kevin Looker |
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| Author: | Colin North [ Mon Feb 25, 2013 7:15 am ] |
| Post subject: | Re: Spraying help/suggestins please. |
Yeah, looks like the spray mist may be "bouncing back" from the surface because air setting is too high, and not laying enough finish down on the surface (and possibly drying out what it does put down). Thanks guys. |
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| Author: | Colin North [ Wed Feb 27, 2013 2:40 pm ] |
| Post subject: | Re: Spraying help/suggestins please. |
Just a quick update. Just feeling my way along - long time since I sprayed last! Played about, spraying some tests on a large cardboard box again. Ended up keeping settings the same for the neck. Increased the lacquer 1/4 turn for the sides, throttling a little on the air. Then upped liquid setting again slightly, and cut the air back to about 2/3 open for the back and top. Seems to be working out better. Thanks again. |
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