There used to be one ultra-sad looking 757 in battleship grey. The “United Airlines” was mostly washed/scuffed off, it had mismatched engine cowlings and there was dirt/gunk all over the fuselage from nose to tail. I took said 757 LGA-ORD and right before takeoff the captain welcomed us to the “friendly skies” and apologized for the look of the aircraft and said he was “embarrassed” to be in command of such and “awful” looking aircraft.

Edit to add: Thanks google. And here she is, in all her glory; the cowlings match but I’m sure this was her:
https://www.airliners.net/photo/Unit...57-222/1693118