To adjust the pressure I squeeze the trigger half way and then adjust the pressure.
My compressor is a 60 gallon Quincy, it is a pretty good one.
I waited about 10 minutes after mixing to paint.
I had to get close, about 4 inches in order to get enough paint coverage.

I could be that the gun is dirty. I do clean it after every time I use it. I have been using laquer thinner, should I use something else?