Things you might wish to consider.
Needs more/darker shade on the rear fuselage, blending up to the panel line just under the 21.
Also needs to have the trailing edge of the wing fairing softened with shade, they are quite rounded and not razor sharp as you have depicted it.
I'd also substantially blur and lessen the highlights running along the top of the fuselage, it'll give a better depiction of the flat paint that these aircraft actually served in, going buy the images that I have at hand.
Or not.
Weathering is very nice, as usual.