Hi all , I seem to be getting a lot of tiny air bubbles appearing when I apply the clear coat, I am carbon skinning parts , I thoroughly clean and prep the parts, No problems with resin when applying, all seems to go very well , I spend a lot of time wet flatting the parts down and to be fair they look perfect ie nice and even , smooth and no visible signs of any holes or bubbles, I use a heat gun during resin coats making sure all bubbles are gone. I use acetone to clean the parts before clear coats, I really can't see why I am getting so many , although I am fairly new to carbon skinning ,I am not a noob when it comes to car painting ,I've been painting for 25+ years now.
Is there anything i am missing here.
Thankyou.

Adhesion promoter is plastic primer, same stuff. 

I've had exactly this problem too.  The key is how you spray.  One option is like warren says by spraying a few dust coats and let the dry before the next.  You can end up with a full layer of dust coats.  This seems to seal the surface and it takes a spray coat just fine afterwards.  The other way I've found that works is to brush a coat on to seal the surface, let that dry and then spray.  IME sealing the surface is the key step.  I'm not sure why this is but its essential.