Ok I have painted many show cars over the years Corvettes and Many others, I am even a Dupont highly recomended Shop. But as far as mine goes I am having a problem I have never seen before.. I will bring you through the steps I took on this vehicle and maybe someone out there has had this problem and fixed and can tell me how to fix it..
First I totally sanded down the car to the gell coat.. Next I applied 4 coats of Sherwin williams P30. I let it sit for 2 days hand blocked it with 600 to complete perfection.. I then applied 4 coats of jet black sherwin basecoat and then 3 coats of sherwin clear.. This isn't the cheap stuff its the top of the line products.. Now I color sanded and buffed to a absolutely beautiful glassey shine.. I was very proud of that finish.. After the very first day I took my car out I pulled it into the garage to wipe it down with mist n shine when I noticed it looked like I had a TON of little Tiny Tiny fish eyes in the finish. (Only on the top panels..) The perfectionist i am I 800 grit the whole car down again and painted it again and buffed and shure as **** same result.. So now its war!!! I did it AGAIN!!!!!!! i just got it out today.. Took it for a ride to show it off, Guess What!!!!! Its there agian... So I spent the later part of the day wetsanding them out again and buffing them out again and they were completely GOne.. Put it out in the sun Guess what?? Its like the plague you can't get rid of it.. Again it is only in the top panels.. Anyone have any ideas??? Please Email me at switzerhenry@yahoo.com or reply to this thread... I wanna keep my vette but I can't have this problem.. I really am a perfectionist and this has almost got me beat!!!

 

your not gonna like the answer....
you have something trapped and it is outgassing in the Sun.
Strip it, and start over.

 

Try posting this in the paint/body section and you may hit an audience that is more likely to have an answer to this.

 

Sounds like it might be solvent pop. Please explain in detail how you stripped the car, with what and over what time period. How did you neutralize the stripper. Did you reduce your prime coats, and if so what did you use? Flash time between primer coats? Dry time before wet sand? Urethane/acrylic urethane basecoat... how many coats, flash time/dry time/baked or no? Ditto clear... what reducer and temps on "the day"? Did the car sit in primer for awhile before you topcoated? Inside/outside/at the mother in law's cat harem? Need more info.

 

This sounds like something I had happen many years ago. But first I should ask you to look closely and see if its craters, or very tiny blisters about the size of a pin head. If it's blister, very tiny bubbles, thousands of them, say, on the hood of your car, then it is probably moisture trapped under one of the layers of paint, or sealer. This can happen if you paint on a really humid day, or if the car was in a cooler, humid environment and moved to warmer where moisture might condens on the surface. Paint surfaces can also become cooler due to the evaporation of solvents on a very hot humid day. So, it's also possible that it didn't have enough time to flash off. It doesn't have to be so much moisture that you can see it either. The fact that it's mostly on the horizontal surfaces (that's the give-away clue) indicates to me that it's probably humidity.

The freaky thing that happened to me in my case was that the bubbles would come when the weather became very humid and disappear when humidity went down. Overall, in my case, 99% of the time it wasn't an issue and the car was cream colored so it wasn't as obvious and we just lived with it, forgot about it ...and would be reminded when it became quite humid outside. Fortunately when we went to sell it it was a nice dry day

If that's the problem and you can't live with it, you'll have to strip it off and start over.


Mark G

 

Its not blisters it looks alot like solvent pop (Mini Craters) but I have a heat controlled and humidity controlled booth.. I know I gave enough time for flash too.. The original paint looked like it had it at one time also but I stripped that with 150 grt paper and went up from there..

 

If you go to forums- General – Paint and Body (last title in the drop down) and post your thread. There is a guy called DUB that will probably help you.
Good luck