Looking for some help on getting good results painting. I use tamiya acrylics thinned 2:1 over tamiya fine primer. The end results are ever good. I have a iwata bro airbrush with a .35 needle set around 35psi. The paint never looks right. Sometimes it's eggshell some times it pits other times it just looks horrible. Any tips on making it look better would help. Thanks.