Thanks for the input so far, inspiring stuff. Been thinking about the fatlanta idea and think it maybe has some mileage in it. Crazier thoughts are along the lines of the American flag: front forks and head tube in blue with white stars, fading into some red/white stripe/fade. Can't quite visualise the red/white, but thing the rest may work (or even in reverse, with the blue/stars at the rear?).
Another thought is a red white blue fade, or simply plain (ish) white with custom fatlanta style yo eddy decals. Thinking about the American roots of the frame.
Oh, on a slightly different topic, the roller for the front mech has been removed and I'm struggling to find a top pull suntour mech. Could I drill the seat tube and add a riv nut? Don't really fancy a problem solver unless I have to, and should I decide not to even respray the frame, I think a roller will be needed. Where on the tube should it sit?