I want to eventually tint my windows, but since the FM antenna is in the back window, I know you cant tint it with metallic tint. Is there such thing as a non-metallic tint? Is that something I would just tell the place I get it tinted at that I want? And if I would get metallic tint, would there be a way to re-rout the FM antenna to the XM antenna on the roof? Or would that get bad reception then?