Paid for - the vanishing point veepster has crash and flat tyre morphs. Works best for close up shots.

Free - take a car from DMI, run it through a modeller and remove all the parts (espically the glass) except for the shell, bonnet and axles, now apply a burnt out rust texture to everything. 
works best for distance shots. 

Pinky - you left the lens cap of your mind on again.