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paint drying with wrinkles
Turnarcades:
--- Quote from: mvsfan on July 18, 2009, 03:16:41 pm ---any kind of grease or wax will spoil a paint job and cause it to wrinkle. this sounds like your problem. anyone painting something this big should always have a gallon of autobody grease and wax remover on hand. this is the stuff that the pros use to clean cars before primer or paint. any ICI body shop supply store sells it.
Thanks.
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Poorly-mixed paints or those stored incorrectly will also do this as the compounds begin to seperate in the tin. In the instance of sprays shaking usually cures this but if it has been stored in extreme hot or cold it will be no good. I had a tin of exterior weather shield that got left in a cold metal shed during a hard freeze and the colour completely seperated from the solvent leaving a coloured sludge at the bottom and a waxy solvent liquid that culd not be mixed back together.
AndyWarne:
From my car-restoration days, I remember the golden rule that if you spray cellulose-based paint over acrylic primer exactly this will happen.
I think cellulose paint is quite rare these days but the problem is still likely to be paint mis-match.
TheShanMan:
I bet it's the length of time you're waiting between coats. I think most if not all spray paints are changing due to stupid EPA requirements, and I ran smack into this problem when working on my tron cab. Are you using Krylon by chance? I know for a fact that this brand has the problem as that's what I've used for a long time. If so, did you notice how the caps are shaped differently than they used to be? They have kind of a tapered look now. Read the instructions closely but IIRC you have to apply multiple coats within 5 or 10 minutes or you have to wait over 24 hours.
I started a similar thread I think on klov at the time, and that is what I learned. Sure enough, it was right on. You gotta follow the instructions precisely.
nazerine:
Most importantly: What type of paint are you using? What type of primer are you using?
Your paint wrinkling is most likely caused by the summer time heat and the paint drying too quickly. If your piece is hot, or you're painting in the sun light you will get this problem. You'll also get wrinkling if you're spraying on a very thick layer of paint.
Best advice would be to wait until it cools down at night, and try again doing very thin light coats. Wait several minutes between coats, or until the 'wet' look starts to go away.
mvsfan:
--- Quote from: TheShanMan on July 20, 2009, 04:04:24 pm ---I bet it's the length of time you're waiting between coats. I think most if not all spray paints are changing due to stupid EPA requirements, and I ran smack into this problem when working on my tron cab. Are you using Krylon by chance? I know for a fact that this brand has the problem as that's what I've used for a long time. If so, did you notice how the caps are shaped differently than they used to be? They have kind of a tapered look now. Read the instructions closely but IIRC you have to apply multiple coats within 5 or 10 minutes or you have to wait over 24 hours.
I started a similar thread I think on klov at the time, and that is what I learned. Sure enough, it was right on. You gotta follow the instructions precisely.
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shanman its true that paints are changing rapidly especially in places like california where its absolutely mandatory to change everything as much as possible to lower the vocs.
its also true that vocs arent good stuff. standing over a can of car paint with no mask on if your stupid enough to is terrible. I had to do this one time in autobody class just because the instructor insisted we do that so well never do it again.
but this is going to take a few years for them to work out where they finally come up with something that sticks as well as the old stuff did. For now, ill just keep on checking my respirator to make sure the cartridges arent bad.
Remember how long it took them to come out with something besides R-12?
it was a long time before "freon" came back to your local auto parts store. But it did, eventually.