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Ok I just painted the top of my 65 c10 white thursday. I had a couple spots that ran in the sealer. SO I painted over the runs then today I sanded the runs out cleaned and repainted the bad spots. The paint did not take it wrinkled up. My question is Sould I resand then reseal the bad spots then repaint or do I have to primer then seal then paint. I am using single stage urathane paint

Hindsight and all that good stuff, when you get runs or any other defects in the substrate (sealer, primer, whatever), stop there, fix the defects, and once corrected, then paint your topcoats. As you've seen, topcoats don't hide flaws.

Once you sanded through the top layer into the sealer, you have exposed the bond between the two layers. Then when you spray on top of this (with the urethane I take it?), you have solvents that attack and loosen this bond, hence the wrinkles. You'll need to resand, feather out the edges, and cover with sealer before proceeding any further. For spraying sealer over an exposed edge like that, I think you'll find a light coat on the initial application will help to seal it off without lifting again.

That is what I thought. I have painted several cars but I usually use a primer that is also a sealer. This time I used a primer that had to be sealed. I was having some trouble with my new paint gun gettting it just right thus the runs in the sealer. How is the best way to fix a run when it is wet? I will resand the bad spots tommorow reseal then repaint.

We've got a local painter that also taught auto body at the vo-tech, that started losing his eyesight to Diabetes until he got it under control. He was painting a car and someone else pointed out to him that he had a run. He went back in with a blow nozzle and used it to flow out the run and blend it in with the surrounding area, undetectable when he was done. Never seen it before, likely will never see it again. I know I personally wouldn't even attempt such a feat for fear of making it worse. In your case, what I likely would have done is to stop where it ran, as it was in a sealer coat, let it dry, and fix the issue. I think if you had tried to wipe the excess it would have made more mess that still wouldn't have been topcoat ready. To be honest, If I'm leaving runs, I'm not spraying topcoat that day as something is going on that needs fixing, whether that be eqpt or the operator just needs to come back another day. Now if the run is in the topcoat, then that can be more easily repaired......

OK I am still having problems with my new paint. I sanded the bad spots down to the metal the feathered the edge of the paint and primer. I put some etching primer over the metal then was going to seal and paint but where the edge of the paint was once the primer hit it started to raise. The same thing happened the last time when I put new paint over the spot except it was not to the metal. Why is the paint reacting to the primer or paint??

Your etch primer likely does not like paint-try another type of primer.

I talked to a body man friend of mine and he said let the primer just overspray the edge of the paint and do this several times until covered. It worked like charm. I was putting it on to wet. Here is a picture of inside I just finished,[IMG]http://i1183.photobucket.com/albums/x472/79broncoowner/th_013.jpg[/IMG]

too much thinner/reducer will cause this! spray a bit "thick",but light, for the first coat.