[Buddy]

I am making four mods to a 2009 Honda Ridgeline truck to improve mpg; one is done - adding a tonneau cover. I would like a rear wing on the tailgate to direct air downward at a 45 degree angle, but don't think I can afford to have a metal fabrication shop make this for me, and it is beyond my skill level. So is there any other type of material that I could use? I plan to do a smoke test at highway speed and videotape it, but that is a different post.