Transit scratchitti removal by controlled fire polishing

摘要

Graffiti vandalism in public transit system is a serious problem. While public transit authorities conquered paint or ink graffiti, a new type of graffiti vandalism emerged and prevails- the scratching/etching of polycarbonate and glass windows, called "scratchitti." As with the paint and ink graffiti, the "scratchitti" gives passengers the impression that vandals are running wild in the transit system. Unlike paint graffiti, the scratches can not be removed or hidden away and cause permanent damage. To run a scratch free fleet, New York City Transit would have to spend &60-70 million per year replacing windows. Nationally, clean-up costs for scratcitti run to