As far as paint goes, there seams to be a couple of opinions based on type of projector. CRT type prefer the flat white color (Behr Ultra White or Glidden flat white) and some of the LCD/DLP crowd like the gray color. I'm part of the later crowd having a Sony VW10HT. I made my screen and got some Glidden interior flat white and Glidden flat black from Home Depot. I mixed to get a color that is darker then 'Snowfield' and lighter then 'veil'...it is close to 'Universal Gray'. The blacks are greatly improved, and the whites are still clean and bright. I used a 'smooth surface' roller and applied about 3 coats to the back side of wood panneling (cheapest one Home Depot had, about $6). This provided a very smooth and light weight alternative to drywall, and is also 4x8 in size. I then framed it out with 1x2 pine wraped in black felt like material. I then hung on wall using 'drop ceiling wire'.