Hi laskdjn. Wher'd you get the 10:5:2 ratio ? The instructions on the website say to use 20-40 drops paint to 4-6 drops thinner. I tried that on their black primer & it was like sludge. It was barely sprayable & I had to wing it by adding much more thinner [ probably closer to what you did ] . After that,it did spray & work wonderfully.Plus, using their thinner to clean my airbrush was a breeze.Later today,I'm gonna put the finish color on,hoping the paint thins better than the primer,especially with adding their polymer additive.Anyone else run into what I did ? Thanks. Keith R.