I have an Optoma HD25-LV in a basement room set at about 13' from the wall. At its smallest, the screen is about 93". I have a white drop ceiling and grayish walls. There will be ambient light most of the time. I'd like to paint a screen. I've lurked and read enough to know that, with all the options available, I need guidance as to surface and paint formulation to use. Thanks in advance.