Here's a way to channel any graffitti urges you might have. Go into demo work. I walked thru the house with the demo guy identifying all the things that were to come out. He followed with spray can in hand. Now our house is lovingly marked with bright pink squiggles and scrawls.
The roofing crew came back this morning and finished the tear-off. I figured a total of 5 hrs x 8 men = 40 man hours to tear 2 layers off a 24 square size roof. The garage is the brightest, airiest room now!