I like the nose checkering (nicely done). I'd suggest going with a slightly more specular materials file, to give it more "gloss" -- it is metal, mostly.
I don't think I like the painting mistakes on the D-Day stripes. The brush strokes are "too regular" and look intentional.
I'd think they'd be going with the stripe, not against it, so you'd get more bowing of the stripe, slight curves, just off-angle lines, rather than bumpy wavy lines.
If I didn't describe that well I can try to re-phrase it. Did you understand what I meant?