The basics Dulling Spray is used to temporarily reduce the shine or glare on items that are being photographed or videotaped. The benefits It is safe for use on non-porous items, including metal, plastic, glass, plaster, and ceramics. And it's removable! The uses You can turn bright shiny metals to dull & tarnished, new wood to centuries old wood, or photos just taken and documents just written to archival quality. The bottom line Movie Paint Products are specially designed for the professional scenic or set painter of the entertainment industry.