Why use Goo V2 projection paint over wall paint for a screen

These pigments are carefully chosen to accurately reflect the full spectrum of color produced by video projectors as opposed to house paints where the goal is to reflect that portion of the light which produces the single desired color. In addition, Goo Systems employs proprietary dispersion and pigment treatment techniques to maximize the reflective properties of the pigments employed. These techniques require custom built machinery and are very time and labor intensive.
Lastly, unlike wall paint which involves the application of a single product, a Screen Goo application consists of two different products. A single coat of Screen Goo Premium 100% Acrylic Base Primer provides an ideal reflective surface to which 2 succeeding coats of our diffusive, color correct Goo 2.0 Finish Coats are added. It is the combination of the Reflective Premium Screen Goo Acrylic Coat and the diffusive Goo 2.0 Finish Coats which gives a Screen Goo screen its remarkable qualities of high reflectivity, color accuracy, wide viewing angles and excellent contrast. The icing on the cake is the very special sense of image depth, or feeling of looking into the picture that only a Screen Goo screen provides.