I covered my 60 size warplane with Silver Ultracoat, had a great time with it only seams are on top and bottom center. The top seam is pinstriped so the Plane pretty much looks painted. I just bought a roll of white Monokote. There is a huge difference with the way the Monokote goes on and it's not for the better. Either way I bet you'll have a great looking plane.
Utracoat has my vote.