Originally Posted by Wet1
A quick observation regarding the Behr UPW... No matter how careful I was, I had a very hard time trying to get rid of roller marks. I tried the smaller 1/4" hard foam (smooth) rollers and a 3/16" synthetic traditional roller. The foam seemed to give better results, but still left some minimal roller marks. My next screen(s) using the remainder of the gallon I bought will be sprayed for this reason. The UPW covers well, but doesn't roll all that well IMO.
Hey WET1 you might try a wetting agent sometimes called an extender....it extends dry time(allows the surface more time to settle and smooth) but it's big attribute to me was it made the paint flow/roll much much better taking the hassle out of eliminating roller marks.
Lastly a comment on spraying......it requires more(technique) to apply spray paint, than rolling. Bottom line the difference in surface texture and smoothness the sprayer offers over the roller would not even come close to the cost of the sprayer or the time is takes to become efficient with it, or the extra prep time and clean up need to use it properly.
My best guess is, at any seating distance on my 110 diag screen with a 720 projector, that their would be NO discernable picture quality difference of the screen texture change. My basic for this comes from I have a 2x4' piece of polywall matt surface it has a vary vary fine matt surface, this poly matt is much finer and more even surface than can be produced with a hand sprayer. When I place Poly on the painted projection screen I can not see a difference in quality at any seating distance.
This is why I advocate that the only difference in spray vers roller is not in the QUALITY of the PICTURE but a spray system has a speed advantage in large JOBS, like whole house painting, the time it takes for set up and cleaning would be a lot longer for a small screen vers a roller and for NO apparent screen quality difference.
My advice is if you HAVE USE for a sprayer other than a screen (I have many rental properties) and have painted many mean hundreds of gal over the last 25 years, a sprayer is a great investment is time saving.
Just a thought...............hear is a screen shot of rolled surface & the Matt Polywall. Their are 2 coats kilz's, 600 grit sanding between coats, 2 coats bright white(eggshell hardness) Wetting agent used... with a 1000 grit sand after first coat and no sanding on the top coat. I used a tack cloth wipe down after each sanding(REAL IMPORTANT) make sure you to do the small things like tack wipe down.http://img.photobucket.com/albums/v1.../PICT01161.jpg
Hope this helps a little: checklst
PS Tiddler I really like your paint solution, this is beacuse it's SIMPLE and shows a vary good quality results,screen shots/test results. I have not tried it but I might in the future, it meets all of my Kiss requirements.