Time consuming, but well worth it.
Go to a local diner and ask to purchase one of their industrial rolls of plastic wrap. Return to the car and commence in wrapping the crap out of it. Make sure halfway through, you put a jumbo sized jar of petroleum jelly on it. After the car is wrapped with the 500 yards of plastic wrap, let the air out of the tires.
I did this when I was in college to a guy who kept parking in my dorm parking spot.
LC