Uh, I have a not-so-nice way to solve this rolling problem. Go to Home Depot or Menards and buy yourself a powersprayer. The Wagner Ultra (I think it was $99).
Play with it for a day or two to get the feel of how it works.
Do your screen with this sprayer.
I actually did this for the first screen I did -- and returned the sprayer for a justified reason. It does overspray alot and I can't see using this for inside your home.
However, after my first screen didn't turn out the right way, I went back and bought one and I'm keeping it.
So I would say, don't bother rolling -- if you can do it -- more power to you, but the best results I could get were from spraying.
And I did five or six versions of the screen. While some of the formula's needed changing, I NEVER had streaking of any type or globs of paint. Occasionally the sprayer would "spit" a small amount, but if you touch it up with a brush, you NEVER know.