New window painting method

I have a client in West Knoxville who sells car audio systems, remote starters, and stuff like that. I painted both of these windows; having been warned about black on glass by other painters. I’ve done it a few times in 30 years, never had a problem; plus, the window is under a large overhang, and the sun doesn’t hit it much. The problem was that the window had an existing BB hole in it. When the sun hit the window, a very irregular crack came across the glass, starting at the hole. The window was replaced, and I decided to put the painting on fluted plastic, called coroplast.The reason being that the flutes will act as insulation to keep the black away from the glass. I used two sided tape carefully and sparingly applied to hold it on the glass. I installed it in cold weather, and from what I know about these things, if it holds in cold weather, it will hold in warm weather.