I've seen the idea for latest Titanium award before.
BikesAgainstBush
There was another artist group in NY that did this 4 years back. People texted or emailed their message and a bicycle sprayed it on the side walk or road in real time. The artists at the time got into trouble and arrested by the NYPD.
Now with a corporate sponsor and a big event behind this technology it's award winning and celebrated in the Tour de France. Funny how the backing of a large brand can make technology legitimate. The technology is not new, you didn't invent it you just used it, just be honest about that in your award entry.
