I used this to paint a 205" (17') diagonal screen in my living room. the reflective level of 1.5 is fantastic. much better whites and contrast than my old screen paint. also black levels are deeper. i'm using it with a viewsonic x10-4ke 4k uhd projector, and the 4k images are astounding. i compared it to an actual silver ticket screen, and the paint is much better.
i rolled it on with the recommended 3/8" nap roller. if you're rolling it, make sure to use a roller handle, and do complete strokes from one end of the screen to the other (or top to bottom) so that it dries without overlap lines. you can't paint it in sections. i did two thick coats and still have some of the gallon leftover. looks great!