That wrap (it was not painted on, it was a decal) job lasted only a few months from October till 2004 till March 2005. IIRC Amtrak got around $10K a month to have it on there. This was later on, at first they did not have the loco number on the side (it was covered by the decal) and that is not legal, as you can see there is an 84 just below the cab window in your picture.
If you want to see how this loco wins at a crossing look at this link and the pictures linked from it.
http://www.click2houston.com/news/13955891/detail.html
It took out three teenagers in August of 2007 aftyer they drove thru the crossing gates and got hit. The car caught fire also after the collision.
Jim