Alright this is a good one to do to cars. Take saran wrap (plastic wrap) and put it on the window/door/hood whatever (windows work best, harder to see) and make sure its on there with no wringles or folds. Now comes the fun part, spray paint whatever graffiti you want on the saran wrap. (ex. pork dagger) You have to be very careful to only spray on the plastic wrap or you're going to have one pissed off friend. Since this a cannabis site and some people will be too ripped to figure this out, it will look like someone tagged his car.