Paint help.

So I just got done spraying primer on a nova. I had done some body work on it and scuffed the rest of the car. After shooting approx. two coats of DP40 with catalyst and reducer (2/1/.5) a few small spots started to bubble up like I had just put aircraft stripper on it. This is not my first paint job and my prep work I'm pretty sure was o.k. I am wondering if anyone knows what might be on the car that caused this. What is the next step, I plan on sanding it back down and removing those areas back to bare metal but is there anything else I need to do to prevent it from happening again? Thanks for the help.
-A

 

What just happened is what is know as "lifting". I actually had this happen to me the last thursday at work.

 

Well, what do I need to fix it/prevent it. Is there a likely reason or did I just plain F up.

 

Describe what paint /coatings were on the car before you shot the dp on. Hard to pin point without more details. I've shot a lot of dp and have only had that happen twice. Both times were on top of questionable previous coatings. It was minimal in both cases.

 

The DP Sealer will generally work over most any substrates. I never use reducer. some of the high speed (cooltemp) reducers can be
sharp. Sounds like there may have been some cheep **** enamal
(tractor paint) or rattle can enamal on your car. Cheep uncatylized
enamal will get you in trouble every time. Sand the crazed areas and
sneek up on it with your sealer, dust it don't soak it. Good luck

 

It has happen to me and if your doing this outside with high humidity, you get mositure trapped and your air line should have a good filtration system as well. Have one at the end of your gun tool. Also, different paints/primers will react to one another. A sealer helps between the layers if you decide to primer over existing paint. Though, it's always good to take it down to metal and start from there. Good luck.

Ken

 

Thanks for the help guys. I'm off to fix.