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Old 10-02-2009, 03:40 PM
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Clear, spray medium or wet

I've usually got more orange peel than I'd like. I use Dupont 7900 clear and a sata 2000 HVLP. When I spray at around 70 deg. I use a 50/50 mix of slow and medium reducer 3-3.5 turns open on the material, fan wide open, 35psi. My compressor makes 24 cfm. The dupont data sheet says spray 2 medium coats, then I finish off with a wet coat. Should I be spraying all coats wet? I recently overer heard a conversation at a paint store and the paint guy was saying to spray the ppg all wet. Wont that cuase more shrikage as the solvents bleed out? I can see how wet coats would help with orange peel. What do you guys think?

Mike

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Old 10-02-2009, 04:30 PM
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When I laid down my PPG DCU2002 clear I started first with a light dust coat, let it flash until I worked my way around to the starting point of the job. Then I laid on a wet coat and let it flash about 45 minutes, second wet coat and let it flash about 45 minutes, same with 3rd and 4th coats. I had to jack up the air pressure to get better atomization to eliminate the peal, but I didn't have as nice a gun as the Sata.

Vince
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Old 10-02-2009, 04:41 PM
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This ppg rep was saying tha a mist coat can cause a delamination, and I was having a hard tim believing that. It just got me thinking maybe I could improve my orange peel. Matbe the iwata is the answer, I've been thinking about one. I'm getting tired of cutting and buffing soo much.

Mike
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Old 10-02-2009, 05:49 PM
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the iwata will lay down thin wet coats . thick coats have peel, thin coats lay down. most guys hose them to get wet and that leads to thanepeel.
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Old 10-02-2009, 08:51 PM
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Quote:
Originally Posted by yeepman2
This ppg rep was saying tha a mist coat can cause a delamination,
Mike
I don't buy it.

Vince
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Old 10-02-2009, 09:13 PM
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PPG causes delamination... Just kidding.......
SPRAY IT LIKE YOU WANT IT TO LOOK.
Realize 1 thing,
The Majors are NOT into SLICK clear jobs. They WANT to replicate OEM finish SO, PEEL is the NORM.Follow the DIRECTIONS and THAT is what you GET.
You want a CUSTOM,SLICK finish,
You have to go OUTSIDE THE BOX.
The FIRST ever clear job I sprayed WITH an LPH-400LV using the "directions" was on a Ford tailgate. I was SO ashamed at the o'peel on it that I cut and buffed it. BIG MISTAKE.....
It stuck out like a sore thumb compaired to the OEM peel on the rest of the truck.I offered to respray it but the owner said not to worry about it cause he was getting rid of the truck anyway.
As a wise man told me (Barry),
Peel is FLUID.
Runs are AIR.
Adjust accordingly.
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Old 10-04-2009, 05:38 AM
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Thats how I do it too... spray it like you want it to look, the brand dont matter...Two coats with proper flash time...dust are to make cheap ,thin SS paints stick better without running ...
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