Why not paint over it with something like the mural they tore down in 1997:
http://www.reocities.com/morasports/mural1.gif
http://www.reocities.com/morasports/RCmural.htm
Might be fantastic to have something really unique for the ESPN and ABC/NBC/CBS sports crews to shoot during time outs, and great to look out when your traveling down Ohio River Blvd.
Also since I've thought about murals, is there any way to paint up that Soviet style architecture that slaps you in the face everytime you leave the Fort Pitt Tunnel, otherwise known as the Hilton/Subhb/Wyndham. I love the building but in a modern 21st century skyline it really just screams Cherynobal or Leningrad. Since there is hundreds of windows that you couldn't paint over maybe just a South Pacific sunrise or something, no specific shapes. Just very vibrant, hot, extreme colors blended together to compliment the surrounding buildings and the skyscrapers behind it, something that would look great in the gray winters and still fit in a sunny summer sky.