I used a mixture of dark earth and red-brown (kind of a brick brown) (0,5 part of each) with lots of clear gloss (9 parts) to get here:
This is Aviattic lozenge, but I didn't to any preshading on the top (just some pre-weathering).
The fuselage was deliberately covered more, as I could see that on more than one picture.
It was later filtered with oils and weathered some more after the decals (weight table etc) were one.
probably seen before, but I arrived here eventually:
[edit]I used lots of lozenge decal scaps to try out first before committing to my model, both for colours and also how many coats I needed before I got something I liked. Once on the model there really isn't an easy way to undo...
Jeroen