If other grown men can play army by driving military vehicles such as Hummers in a civilian setting, why can't we have a little fun too ?
Imagine a matte finish charcoal grey primer or matte black finish on our cars.
This would not only look 'cool' but would hide any ..ahem....
imperfections 
.
A few rivets and such for that added 'military' look, as well as some stencils.
I was inspired by several cars on this site - TomO's VX with its shark mouth paint job, and BlownB10s awesome Sentra come to mind.
version 1 ( modified photo -digital )
version 2 ( mixed media )
I was thinking of how that something like this could be functional.
If you notice, the boat-tail has a 'cool' checker pattern on it like an old WWII fighter, but this actually serves a function, since it keeps people from driving into you because you are now highly visible - The orange is fluorescent.
As mentioned before, the matte black primer paint job looks 'cool' but also hides imperfections. ( and it's inexpensive and easy to touch up !
The white and yellow checker pattern on the roof of the car serves to reflect heat on the dark car, but also goes with the warplane theme.
I think it would be cool to have little stencil decals of an oil rig to symbolize the fuel saved.
This would be like the little 'kills' stencils on warplanes.
You could put something like "75 MPG" underneath.