If you want to try something different, I know at least two US railroads painted a diesel locomotive up in desert camouflage in 1991 to honor employees who were reservists called up for Desert Storm.
That came out very nicely. Always thought the Mk I was an excellent candidate for a scale-o-rama, but not quite like this (I think the design would make a splendid 'landship' with a five of six inch gun in the turret.)