That looks really good Tony. As Graham said it looks like it could be 1/48 (or 1/498!).
Drew,that scheme was the official scheme for the Bf109 at this time. New aircraft came out of the assembly plants like that and older aircraft,which would have been in a two green (RLM70/71) splinter scheme were supposed to be refinished like that.
The mottling,which I think is what you mean by "shark skin" was initially applied over this scheme (as done by Tony) at unit level in a bewildering variety of styles. The units considered the official high demarcation line and blue fuselage sides to compromise their camouflage. Galland said it made their aircraft too visible on the ground. It is often forgotten that the RAF mounted frequent harrassing raids on the forward Luftwaffe fields using hopelessly outclassed aircraft like the Battle and Blenheim at a very considerable cost. Some bomber squadrons were literally wiped out. The mottle was usually applied to the fuselage and fin,rarely the upper wing/tailplane surfaces.
Later it was done, slightly more uniformly, at the points of production.
Cheers
Steve