A sugestion airmess.
Not really much, since its clear that you're way better than me in skinning stuff

but I deem that what HT and co. wants is a plane that looks like it's seen some service time - maybe 6 months~ year or so.
For instance, a suggestion, by looking at the pics:
Where would scuffs or smudges manifest? Typically at some places, like;
* the broad top surface of the wings: When small stone chips, grainy sand collide and bounce as the plane flies, these leave a sharp line of scratch in the direction of the leading edge->trailing edge.
* wingroots: also very characteristic of WW2 planes, as mechanics and pilots regularly step over these parts to enter the plane.
* canopy frame: near the adjacent areas of the canopy and the fuselage - lots of metal contact as the canopy opens and closes, which tears away the paint.
* moveable joints: ailerons, elevators, flaps and such - paints are chipped off folowing the joint line.
* leading edges of the wings and horizontal/vertical stabs: these are the areas where the wind meets the plane with the most friction.
* dust or mud: typically seen around the gears and underbelly of the plane.
* leaking drops of oil: also commonly visible at the underbelly
* exhaust smoke smudges: the exhaust ports seem very clean - as the engine fires up, almost all WW2 planes spew black smoke through these ports, even flames! in some cases. This leaves a distinct black trail of smoke at the exhaust ducts/pipes/ports.
Add in some of them, and I think it'll be immediately accepted - the 205 looks absolutely brilliant!