I decided kinda reluctantly that the Ironman decal needed to go (I'm more of a Jelloman - I tried to trade my hood insert to the real Ironman: Triathlete, but he wouldn't go for it) so I repainted it last month. The results are:

The Alien Bat

Here's a brief how-to on what I did:
I peeled the letters off, sanded the insert with 1000 wet dry and painted it with two coats of PPG Strong Black auto paint. The Ironman ghost came through again, so I had to resand and add another coat of black. I drew the bat image I wanted on the insert and airbrushed it with white PPG paint. Cleared twice with PPG clear coat and polished until it looks like black glass.

I saw a cool Calvin and Hobbes theme on someone's hood (Sorry I don't remember who!). I'm curious what else has been done?