Thanks for the input, everyone! I'm not worried about longevity; as often as I change things up on this car I probably wouldn't have it on more than a couple years anyway. I've had cheap chrome vinyl on the roof since last year and it's holding up just fine, so I'm not worried about using the cheap stuff for a camo wrap.
If I do this, I'll go all out to make it look like an actual prototype--wrapping portions of the lights (keeping reflectors/markers visible for legality, of course) and covering the useless quarter windows. Roof I'll keep chrome, and the bumpers I might just Plasti-dip flat black for laziness' sake. Or I'll just cover them in Gorilla tape like this Maxima prototype from a couple years ago:
With the whole mirrorless look, I can imagine people being fooled into thinking it's actually some sort of OEM test car--which I think would be hilarious.