Go for it. Think about it, you bindings get wet all the time, there shouldn't be any damage. This topic has come up before. Just rinse them real good after, and don't use water that is too hot. And the din window is a different type of plastic that is not very porous, so it shouldn't dye or dye very much. Plus it is clear, so even if it does dye, it will still be see through just with a shade of whatever color you do. I would suggest doing something other than black though, you could have just purchased black bindings. Do a color that will really stand out.