I'm kinda old school and have had some off the wall Ideas that I never found someone to pay me to do and as old as I am and retired, I will probably never use them.
I've always wanted to make a woody by duplicating tiger oak and calling it Oakey Dokie.
I've always wanted to paint a car with emerald green 4 leaf clovers and calling it Luck of the Irish in gold leaf.
I've always wanted to paint a car that looks like a jig saw puzzle, possibly with a piece missing or not quite in place on each side.
I've always wanted to paint a big blood shot eye on each side of a drag car and write Red Eye under it. Just to get the other guy thinking.
I've thought about tyeing a striped taffy paint job with a big tongue and calling it likity split. You could get more courageous with that.
I've thought a pair of tiddy whiteys pulled up by a hand on the trunk saying nothing says Love like a snuggie.
On the right kind of car you could give the optical illusion that the hood is still open a bit. Put a mechanic head first in it with some but crack showing of course. I'll have her fixed in a minute boss.
The best graphic of all is to rent the sides out, a sponsors name is always pretty. If you can dream it you can do it.