So I'm thinking ZASV could also stand for "Zombie Apocalypse STRIKE Vehicle," too. Either way, it should be camouflaged accordingly.
I'm thinking lots of blood spatters, things that look like brain matter, bones, eye balls, and general gore would work. Maybe a leg sticking out of the grill, pieces of clothing stuck into cracks. That sort of thing.
You're going to have some righteous firepower sticking out the top, right?