I believe I'm finished. At this point I really have no choice since we just got the new carpet installed and if I even look at the paint sprayer now, my wife may very well make me sleep in the garage. All told, I think I put on about 18-20 light coats, but I'll admit that the first 10 were so light they probably equated to about 3 effective coats. I painted up a small strip of MDF with just primer to have something to compare, spring-clamped it to the screen and when I pulled it off the next morning I had a chunk of the MDF stuck to my screen
Had to scrape and spot sand the little bitch and try to blend it in. Turned out ok. I occaisionally notice a small spot that looks dirty at the very top of the screen. Only even comes into play if the media is 16:9 anyway.
I'm sure I could have put down another coat or two, but I'm happy with where it is now. Some things seem to get kind of misty (darker scene with, say, a lamp in the corner) but that could be a combination of the projector, calibration and screen.
It is really quite amazing when you watch a movie and actually forget to look for problems, how stunning it actually is. That's one thing I've noticed abundantly on these forums. Way too many guys getting lost in the minutia of tweaking this, analyzing that, taking tests and comparisons and reading thousands of posts and never really enjoying this expensive-ass hobby.
I think I'll go watch a movie now. Maybe I'll plug in some of my sorry-ass screenies later in the week!