I finally set up my matte white Formica (4 by 8 foot.) I had left it rolled for a few months and it was a bear to work with!
At my stupid-close "IMAX" seat, like 7 feet or so, I had some hot-spotting/glare in the center as well as a "silk screen effect" from the little highlights created by the texture (it's like a stationary grain over the image, but takes on a shimmery look if you move your head.) Backing off a little to 10 feet or so diffuses it a lot, to the point where it's no longer problematic for me at this time. This time next week, who knows!
It's much brighter than the $100 vinyl screen bundled with the purchase. Understandable, as the vinyl is transmissive enough to be sort of a (bad) rear-projection candidate! I hung black velvet behind it to kill return/scatter from kicking my black levels up. The laminate is very nearly opaque, with much more light bouncing back to the viewer.
I buffed a sample chip of the matte white with a green Scotchbrite pad and it killed the glare and leveled the mild texture a bit. Just tilting around in front of the untreated screen shows it to have much less glare. I don't know how uniform a job I could do on a 4 x 8 though!
I'll probably try shooting one of the paints at some point, but for now I wanted to play with a basic stock-material install.