ULTRA SHORT THROW with AMBIENT LIGHT REJECTIONPaint On Screen has the coating you are looking for when it comes to Ultra Short Throw projection screens and areas with High Ambient Light. UST-ALR is a project-specific formulation designed to get the most out of your ultra-short-throw projectorGain. 8Wide Angle ViewingEdge Blending - YesRoll or Spray Application. With a steady gain of. 8 and a wide viewing angle over 80 this coating can perform anywhere you demand a short-throw application.