Okay, I'm really surprised I haven't read this one yet. My sis did this to a friend several summers ago. She simply got a jumbo roll of plastic wrap (available at Sam's Club), waited until her unsuspecting "friend" was at work, then wrapped his entire car. Keep in mind that the tighter you pull plastic wrap, the more clingy it becomes. Oh, and the heat of summer adds a nice touch. I believe the guy had to use a knife to cut his way into his own car at the end of the day. No permanent damage, but it wastes HOURS!!!