Hobby Chrome & Mirrorspray can be used to obtain a mirror effect on glass and different sorts of transparent plastics. Recommended working temperature: ± 20°C. The object to be treated should be degreased with alcohol window cleaner until dirt or streakes are no longer visible. Spray many very thin layers (± 10) very evenly on the backside of the object with intervals of ± 5 minutes between layers. This will prevent unwanted side-effects (matting). You can use black cardboard or paper as background for a more attractive mirror effect. You can also use black water colour.