Hi,
what is the exact point you don't like on the wings? Is it the grainy, speckled appearance? Too many color and to less diluted I would guess. But I can't see such a huge problem here. If I were you, I'd spray some thin coats of very heavily diluted buff color over the wings. That would intense the weathered look (ok, no long service times for the SSW D III, but well...) and reduce the shading effect a little.
Anyway I love your built, this is a very fine D III !
Borsos