Approximately ten years ago, it became the fashion to coat outdoor murals with a newly developed urethane emulsion coating that was touted to be a "cure" for graffiti. The main selling point of this coating was the fact that in was virtually indestructible, did not succumb to the usual hydrocarbons such as toluene, acetone, lacquer thinner, MEK etc. that are the usual solvent components of most marking pens and spray can paint. Certainly the idea of a "suit of armor" that could withstand the worst that graffiti vandals could dish out had a certain appeal to frustrated artists who had become accustomed to seeing their finely wrought work executed under physically dangerous and fumigatiously unpleasant circumstances wiped out by a few arrogant passes of a 98 cent can of fifth class hot rod primer.