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Old 01-19-2011, 07:13 PM
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HELP! How do I clean up after waterbase

I am doing some spray out cards of a Sherwin Williams color from the Planet Color line , its the AWx waterbas system and the only thing I overlooked was how to clean the gun afterwards , I'm not sure if gunwash will work , dont know what the heck to use , any help would be appreciated.

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Old 01-19-2011, 07:50 PM
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plain water,,,then regular gun wash thinner
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Old 01-20-2011, 07:49 PM
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Thanks Milo, I asked the Manufacturer today and they told me Acetone. In my opinion both water and acetone dont work worth a crap, they both leave alot of chunky type of residue, certainly doesnt melt away the product. So far my first waterbase experience absolutley sucks , I hate this stuff.
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Old 01-21-2011, 08:35 AM
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After spraying AutoAir, I simply remove the cup and submerge
the gun in a bucket of water and pull the trigger. Very quick and easy.
After cleaning, I then run a few ounces of alcohol through the gun.

This works on the WB urethanes I spray, but haven't tried AWX.
How long is the paint sitting in the gun before cleaning?
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Old 01-21-2011, 08:56 PM
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It was actually in the gun a long time , it took 7 coats to get coverage, the color was an orange ground coat for a tri-coat.
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Old 01-21-2011, 09:52 PM
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Quote:
Originally Posted by outlaw17
It was actually in the gun a long time , it took 7 coats to get coverage, the color was an orange ground coat for a tri-coat.
I thought it might be drying in the gun...?

You could pour a few drops of paint in a glass jar, and test which liquid
would dissolve it best; whether water, alcohol, acetone, etc.

Since the gun had a chunky residue when cleaned with acetone,
I'll bet the paint was already dried in the gun. Acetone should have
dissolved it. (Or maybe the acetone was reacting with the waterbase
AWX? Either way a mix test in a jar should tell what's happening.)
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Old 01-21-2011, 11:05 PM
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Quote:
Originally Posted by outlaw17
It was actually in the gun a long time , it took 7 coats to get coverage, the color was an orange ground coat for a tri-coat.
Your post tells me a lot. I am certified in the AWX Waterbourne system and there are things not covered in the training that you only learn through experience.

First, you know each coat needs to be completely dehydrated before applying the next coat. In sunny summer days thatís not going to be a problem as each coat will most likely dehydrate within reasonable time. However, in cold climates youíre going to have problems. In order for waterbourne paint to dehydrate you need to keep constant air flow over it. Thatís mandatory. Drawing cold air over it will retard the dehydration process lengthening the in between coat times. Spray-booths without a heating system vents your warm air out, then draws cold air in. Thatís why heated spray-booths are mandatory for implementing this system. The extended periods between coats without emptying and cleaning your gun could lead problems later with the gun if not addressed in time especially with activated product in cup.

Additionally, painting a whole car would be difficult for one guy alone under those circumstances. The technician would require a helper utilizing a heat-gun to assist in dehydrating between coats. Doing just a panel repair or two the single technician should be able handle the job solo.

I wonít go into if itís pouring rain outside in the summer time what mess youíre going to have even with the best heated spray-booth on the market except to say youíll never try spraying waterbourne when it rains again and Iíll leave it at that.

Iíll venture a guess that you used the Barret Jackson, Planet Color line. Orange ground coat for tri-coat sure rings a bell. Seven coats also suggests you disregarded the value shading undercoat recommended for that color. Shade 1, white. Two coats would have been enough instead of seven. You used three and a half times the base needed and the respected same paint time required to apply the base.
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Old 01-23-2011, 08:27 AM
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Spraying a couple cards in the garage witout proper air movement was what I did just to get some sort of idea of how the stuff works , WRONG ! I sprayed the car yesterday in a heated downdraft booth and what an absolute pleasure it was to spray, it was completely different that spraying a card in the garage. The car was originally red and was being changed to Orange Crush, it had grey primer on it and I made sure any spot that was sanded through was covered with a prime etch and I had total coverage in 2 coats, put 3 on just to be sure , then 3 coats of mid-coat, turned out pretty nice.
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Old 01-23-2011, 09:41 AM
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So you just left the unused product in the gun too long. We all do that at some point. Waterbourne isnít as easy to deal with as solvent based product products. But, as you see it is a pleasure to work with. I canít switch over to it completely because I donít have a heated booth. I can do panel repairs but not complete repaints.

Heed my warning when trying to paint when itís raining with high humidity. Even with a heated booth it is difficult to get each coat to dehydrate. The shop next to me is totally switched over to the waterbourne system and dread every day it rains.

The car came out great, congratulations.
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