Here is some tag art on a rail car in the Santa Fe railyard. Not sure whether it is grafitti, or if they hired some kid to do it. 

I have complained in columns about corrugated steel buildings. Here, for the first time that I have seen, somebody tried to embellish a steel building in an artistic way. They used hollow square steel bars and canvas belts. 

Not sure whether this works, but it looks like something I would try, so I admire the effort.