Nice one, but firstly, you used the paint for the number 12 lol the 11 one doesn't have the redd banner on the windscreen and doesn't have the yellow aero tips in the front nor the wiper. the rims needs to be a dark grey metallic for both cars. the aero tips on the 11 one should be black(if Ican see correctly on the pictures from the real ones) the white line around the front grill should be thinner. same for the wheel arches ones. the thickness of the white line on the sides is spot on and should be the same on the wheel arches. the main blue should maybe be just a little bit darker. otherwise, it's a very good skin :)
The main thing was: this model again is not so nice to skin since there are many little issues with the mapping and the further I got the less I wanted to give up the work I already invested. So I actually decided I'd prefer to finish a clean version of that skin rather than a historical exact one which lead to compromises.
Please try skinning that one and you might see what I mean. Chris