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 Post subject: Nitro problem
PostPosted: Sat Mar 29, 2014 8:45 pm 
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Walnut
Walnut

Joined: Sat Jun 01, 2013 9:44 pm
Posts: 39
First name: Van
Last Name: Savage
City: Marion
State: AR
Zip/Postal Code: 72364
Country: USA
Focus: Build
Status: Amateur
I sprayed amber nitro out of a can and it had a white haze to it. The body painted fine with no problems. This is the headstock I'm working on. I believe it happened because it was raining all day while I sprayed in the garage. Anyone else have this happen? Do I try to sand till the haze is gone or just strip it off and start again?
Cheers


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 Post subject: Re: Nitro problem
PostPosted: Sat Mar 29, 2014 9:44 pm 
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Koa
Koa

Joined: Sun Sep 16, 2007 1:27 pm
Posts: 709
Location: United States
First name: Dave
Last Name: Livermore
State: Minnesota
Focus: Build
Status: Semi-pro
Take Ten deep breaths, then ten more.
Repeat until the haze gasses off an you can move forward.

Find someplace warm and dry to keep the guitar for a few days.

Been there, done that. No need to strip and start over yet.

Patience is a virtue.

dl



These users thanked the author Dave Livermore for the post: Van Savage (Sat Apr 12, 2014 11:09 pm)
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 Post subject: Re: Nitro problem
PostPosted: Sat Mar 29, 2014 10:01 pm 
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Brazilian Rosewood
Brazilian Rosewood

Joined: Fri Apr 02, 2010 10:35 pm
Posts: 2561
Country: USA
Focus: Repair
Status: Professional
If it's only the most recent coat that hazed, blush eraser will fix it right up.
It might clear out on it's own though.

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Old growth, shmold growth!



These users thanked the author theguitarwhisperer for the post: Van Savage (Sat Apr 12, 2014 11:09 pm)
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 Post subject: Re: Nitro problem
PostPosted: Wed Apr 16, 2014 11:42 pm 
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Cocobolo
Cocobolo

Joined: Sat Apr 28, 2012 7:27 pm
Posts: 277
First name: James
Last Name: Greene
State: Maine
Focus: Build
Status: Semi-pro
Don't give up on her yet! Spray that baby down with 100% lacquer thinner in an hvlp gun. Don't make it drip with thinner, just spray it on thoroughly like as if your spraying a lacquer coat. If you don't have an hvlp gun and compressor, get a little prevail sprayer. The thinner will soften the finish enough to allow the moisture to escape.

I have had success with this a number of times.

EDIT Just saw that this is two weeks old. So, for future reference I guess!



These users thanked the author Irving for the post: Van Savage (Sat Apr 19, 2014 10:39 pm)
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 Post subject: Re: Nitro problem
PostPosted: Thu Apr 17, 2014 9:26 am 
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Koa
Koa

Joined: Mon Jul 11, 2005 5:17 am
Posts: 1011
Location: United States
City: Tyler
State: Texas
Exactly what Irving said. No need for retarders and lacquer washcoats, just spray it with lacquer thinner. If you wait until the humidity drops outside, it will clear up in seconds after spraying the thinner.



These users thanked the author Glen H for the post: Van Savage (Sat Apr 19, 2014 10:39 pm)
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 Post subject: Re: Nitro problem
PostPosted: Thu Apr 17, 2014 10:20 am 
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Contributing Member
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Joined: Sun Mar 06, 2011 12:04 am
Posts: 5825
First name: Chris
Last Name: Pile
City: Wichita
State: Kansas
Country: Good old US of A
Focus: Repair
Status: Professional
And next time.... wait until the humidity is below 50%.

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These users thanked the author Chris Pile for the post: Van Savage (Sat Apr 19, 2014 10:40 pm)
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 Post subject: Re: Nitro problem
PostPosted: Thu Apr 17, 2014 11:40 am 
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Cocobolo
Cocobolo

Joined: Thu Oct 27, 2011 11:28 am
Posts: 184
First name: Leonard
Last Name: Duke
City: Kalamazoo
State: MI
Zip/Postal Code: 49001
Country: USA
Focus: Repair
Status: Amateur
And if the thinner doesn't do it, there is a strong chemical called butyl cellusolve. I get it at a store that specializes in supplies for professional painters. It is called a retarder, but it also helps layers of slightly different finishes bind to each other. It is horrible nasty toxic, only use outdoors. It evaporates slow, and eats into the finish, which sounds bad but it can sometimes release the trapped moisture causing the haze. Mix a little bit with thinner and start with only the flat surfaces which can be set level. The counterperson at the paint store will probably give you other warnings and tips. The sooner you apply this first aid, the better.
To avoid haze:
From the compressor, run 25 feet of line before a water trap.
Don't spray on humid days unless you use a 300 watt halogen light to gently and safely warm up the guitar and the paint gun. You want to keep the guitar, the lacquer and the gun slightly warmer than the air throughout the process. Don't overheat!
Use a dessicant dryer in the airline. It has crystals in it that you dry out occaisionally in an oven.



These users thanked the author philosofriend for the post: Van Savage (Sat Apr 19, 2014 10:41 pm)
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