These are cross-posted in my thread. Photos from this weekend's car show.
This first image blew my mind. Looking at the car with the naked eye, the windows were clear. When I put my camera up to my eye, the windows had a hazy, white chalky appearance. So I rotated my CP filter, and surprisingly these colors in the window popped out. I went over and spoke with the guys asking what was going on with the windows while showing one of them the image. He said the windows are plastic. After posting this on FB, the woman who organized the car show said this is a racing car. The windows have to be plastic in case of a crash and subsequent fire. It is easier to pull out the driver. All of this car's images have this rainbow effect.