So I got this build finished this evening. Few areas I would have rather done better with, although the canopy masking worked well, there is a slight "rim" of the primer showing under the green colour round each pane which is a bit irritating, but hey ho.
Nice weathering on the underside really looks the part.
What did you use for the exhaust weathering? (As in the dark marks on the wings)
I have a small Tamiya weathering set, like a make up set. Has a black, rust and white pigment in it. So I just rub that on where I want the stains (the black and rust, not the white). It works well.