I got a sample of 3M Vinyl Wrap material, the kind you would wrap a car with. Works great except for one small problem. I tested the sample on one of the window flaps. I put it in the freezer for a while and then took it out and flexed it and the vinyl wrap material cracked. So if you live and travel in a climate that does not freeze this will work, but here in CO it won't. So now my wife is going to Joanne Fabrics to see what she can come up with to help "decorate.". God help me, what have I started?