Nothing sounds right about that brush, I had a passche vl that gave me nothing but fits. No matter what I did it would not spray right.
I got an Iwata Eclipse and I've never looked back.
www.dixieart.com, offers free shipping on orders over 65 bucks and has the cheapes prices on Iwata brushes. Just save your money untill you can get a gravity feed eclipse and a hose. You will be so much happier with an Iwata.
Take a look at WASCO for taxidermy paint, wildlife colors by Smith Paint. I can spray 95% of their colors at 15-18psi, and you've seen how good the colors look in my pics.
I know exactly how ticked you are right now, I've been there.