I posted my thoughts on using the MaxxMudd 2.1 in another thread, so I thought I would post them here as well, as they would probably get lost in the other thread. pb_maxxx helped me a ton along the way. Anyway, I used the version prior to the 11-11-11 update, which meant I used the liquitex white as opposed to the Behr. I also used the melamine white board from Menard's. Prior to this screen, I was using an unpainted BOC screen, that was a bit big for the image my Mitsubishi HC1500 was projecting. The white board fits the image perfectly. Before painting, I compared the melamine board with the BOC and could tell little difference in ambient light or controlled lighting conditionsl.
Anyway, once I finished applying the paint and gave it 24 hours to dry, I put in the Avatar Blu-ray, and it looked great. I then put up the 8 inch board of melamine that I sawed off in the beginning to see if I could tell what difference the paint made, if any.
With some ambient light on, which included some cans that hit the screen, I could definately see where on the plain white melamine, the light washed away some of the image. While the light washed away some of the image on the painted surface, it was not nearly as noticeable, and the improvement could easily be seen. When I turn off all the lights, the difference was only really noticeable in dark scenes, where the blacks were clearly darker, and the image had more depth.
My wife came down and even commented how great it looked, and she never indulges my video/audio purchases/projects. She and my kids both commented that the image looked 3D, and my wife also noticed the differences with the lights on, and in the black levels with the lights off.
So for anyone debating whether to paint your screen with this mix, I can definately say you will see a noticeable improvement in ambient light conditions and an improvement in dark scenes and depth in controlled lighting situations. These improvements were noticeable within 24 hours of applying the last coat of paint, and are still noticeable. After a few weeks, the improvement in the image depth is really noticeable. I have no hotspotting, sparklies or anything of that nature..
On top of that, it was fairly easy - and I am not the most handy person in the world