Greetings,

Noticed your post and wanted to tell you that I sometimes have this same problem when spraying MM acrylics.  The rough surface is because the paint is drying too fast and is probably almost dry as it reaches the surface of the model.  I recently had the same experience with MM acrylics.  I did not want to strip the model and start over so I started experimenting.  I took a q-tip and started rubbing the surface and found that the q-tip was polishing the bumps down.  Then I stuck the q-tip in my mouth and thought some type of lube might work even better.  So what the heck, why not good old cheap and plentiful saliva.  It worked like a charm.  After the surface was polished smooth, I adjusted my thinner/paint/pressure ratio and went over the piece with a light coat.  Good as new.

BTW MM acrylic tastes pretty good too!!!  (just kidding)

cbreeze