haha, thanks. I am also worried about Ford copyright and trademark issues, but as long as I don't actually have the Ford label anywhere on packaging, etc, I should be okay (I think).
The grille and Tailgate lettering should be okay, I'd think, because I am replicating what I see in my art. It would be like somebody using that in their painting-they are replicating what they see-it's their art, not Ford's.
I also thought about leaving all emblems off the car-the builder would then have to put them on, but that's really easy.