How about marine or actual shrink wrap? Members had talked about doing this, so I gave it a try:
http://ecomodder.com/forum/showthrea...ock-25986.html
It must be bad when ecomodders bully you for aesthetics...
This member used nylon:
http://ecomodder.com/forum/showthrea...ver-13395.html
What about duct-taping a black garbage bag to it?
(For either vehicle)