Didn't you know, Wookies (especially Wookie pimps) are prone to fecal lead syndrome. Therefore, since your particular box of poop actually absorbs the radar signal, it provides a smelly form of passive stealth by reducing your car's radar cross-section. You might do well to smear some on the nose of the car, it'll really help that way. Be sure to cover the headlights; they're super-reflective, and you've got terrific night vision anyway.