The Screen goo max contrast finish coating is the diffusive component of the screen goo two part video projection screen system to be used in conjunction with, and applied subsequently to, screen goo max contrast reflective coating.<br><b>General:</b> Substrate should be free of grease, oil, dirt, fingerprints and other contaminants.<br><b>Drywall:</b> Minimum level 4 finish recommended. Prime with 100% acrylic water base or urethane modified acrylic primers only.<br><b>Wood Products:</b> Prime with 100% acrylic water base or urethane modified acrylic primers only .<br><b>Fabrics:</b> Will adhere correctly and permanently to all natural fibre materials: canvas, muslin, etc. Not recommended for application to PVC, polyester and any substrate containing solvents or volatile plasticizers, unless these are first primed with a urethane modified acrylic primer.