I can see your point of view Karnak, the Finnish variant had a better performance than any other Brewster used in WW2. However I checked with HTC when the B-239 came out and they are OK with any Buffalo variant being skinned on it.
Vraciu, the skin uses a specularity map which lets me alter how matt or shiny any pixel on the skin appears. In this case the base paint is RGB 32/32/32 on the spec map and there are various darker dirt effects overlaying that. The holes, shadows and panel lines are made much darker and so more matt on the spec map while the paint chips, glass lenses are mapped lighter and shinier. This gives a more realistic effect especially when the screenshot is taken from the right angle for the sunlight to reflect off the plane and show the effect.
