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Old 11-16-2002, 09:34 AM
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Post Solvent Popping??Help....

Yesterday I started painting the inside doors and fenders on my truck. I did the standard soap and water wash and superclean wipedown. When I started spraying the base coat it looked like in places I was spraying on wax or something, like fish eyes everywhere. I know the surfaces were clean though. After letting the first coat dry, for grins I tryed another. It went on perfectly and seemed to smooth out the blouches from the first coat. I took a fender and showed the paint store and the rep said it was "Solvent Popping. He said the cleaner was bonding with the paint and releasing when The base reducer/stabilizer hit it. Is this true? I noticed this a little last weekend in a few spots but not as bad. My shop was a little cooler this weekend though(about 70 inside). The paint rep said it would be fine and adhesion would still be good. Does this sound correct? He suggested I just use enamel reducer in the future instead of the cleaner. I just dont want to start on the exterior until I am confident this is not going to cause problems down the road. I am using Martin Seniour Urethane Base.

Thanks,

chris

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Old 11-16-2002, 11:17 AM
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You must do your final cleaning of the surface with a suitable wax and grease remover. Sounds to me that you have surface contamination rather than solvent pop on the surface. Solvent pop resembles tiny blisters that work to the surface and usually open up releasing the trapped remnants of solvent. Just prior to painting wipe your surface with a good wax and grease remover using clean cloths and use a tack cloth to pick up any dust on the surface.
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Old 11-16-2002, 11:28 AM
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Soap residue. Shoulda, used a good pre-cleaner. Here are some ingredients of soap.

Propylene Glycol- Humectant that promotes the retention of moisture

Water Vehicle

Sorbitol - Humectant that promotes the retention of moisture

Sodium Stearate- End result is soap

Sodium Laureth Sulfate- Cleaning and foaming agent

Glycerin - Humectant that promotes the retention of moisture

Sodium Myristate - End result is soap

Trienthanolamine - Neutralizes fats and oils and promote the formation of soap

TEA-Stearate - End result is soap

TEA-Myristate - End result is soap

Tetrasodium Etidronate - Chelating agent, helps prevent soap scum

Pentasodium Pentetate - Chelating agent that competes with metal ions in water

Titanium Dioxide- Provides color to opaque soap

Are you sure you want to paint over this. Also quite a few soaps have animal fat in them. Thats why your skin doesn't dry out.
Animal fat=grease. Paint don't stick to grease. Depending on the soap you used depends on what was left on the car. The only thing you can do now is either let it dry, sand, clean, seal, then re-shoot, or strip, sand, seal, then re-shoot. Expensive lesson learned.
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Old 11-16-2002, 12:23 PM
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yes sounds like u got some soap left behind, and soap is NOT compatible with paint, you should use grease and wax remover sold in any auto paint store, but take two rags one for applying it onto body and the other one to wipe it off before it dries, cause wax and grease remover works by lifting dirt and wax off when its wet. After ure done with that buy one of those tack cloth, should be available at ur paint store, and use it just BEFORE u spray, it sticks dirt and lint to it off the surface and u get very clean surface.
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Old 11-16-2002, 07:46 PM
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Some of the silicone waxes are dang near impossible toi get off with soap and water, will also cause paint problems. Dan
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Old 11-16-2002, 08:01 PM
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Okay, should have been clearer. I used Super Clean, a wax and grease remover after the soap and water.

Also, After I applied the second coat of base it all smoothed out. I went ahead and shot a clear coat to see how it reacted. Everything looked perfect. No lifting or anything.

I have only done the inside of the fenders and doors to this point. Is there a chance that later on the paint will start to delaminate? I am thinking this will be a resounding YES. I am definately going to stop using soap though as I am sure this was probably the problem.

Thanks for the input guys. I am still learning all the little oh *****s of painting. I have a few jobs under my belt, but I seem to learn something new everytime.


Chris
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