Theatrical Sony "colour" commercial: "Huge quantities of paint were needed to accomplish this, which had to be delivered in 1 tonne trucks and mixed on-site by 20 people... The cleaning took 5 days and 60 people. Thankfully, the use of a special water-based paint made it easy to scrape-up once the water had evaporated."
Also see the older Sony San Francisco "superballs" commercial.
Good campaign, not that I'm about to shell out for one of their flat screens, but I'd probably be susceptible were I in the market for one.
Hat tip: Slate's ad report card.