Projector central claims that shirwin williams pro classic extra white to be a 1.1 gain painted screen. Has this ever been confirmed on this forum? Thanks

I just finished painting my screen with the shirwin williams proclasic extra white. I did 2 coats of primer and 2 coats of sw and it's hotspoting. I'm getting vertical lines that change places as i move from left to right. I painted it 30 hours ago. Will this still disappear or am i screwed. The...

I have a sample painted of shirwin Williams white satin and the results are amazing but before I paint the whole screen I would like to make a sample board of a grey paint. What can you recommend for a Epsom 8500 ub in a light controlled theatre with dark walls. Thanks