An ultra pure white flat paint will do just as good as most mfg. screens. My first screen was a Mississippi Mud over Silver Metalic which is one of the most popular found on AVSforum in the DIY Screen forum.

I'm currently using a Dazian fabric wich is a PVC matte white non-perf material stretched over a wood frame, 51" x 120".

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85