My Ork plane project is far off, but I have been looking at paint jobs that work for me. I originally thought about painting most as shiny, weathered, chrome. But, paint jobs of 1960-1990s African Airfare planes seems like a good idea too.
This first picture, above, is from James Shields, found here. I could even make a decal or stencil for the “Airforce” roundel on the wing.
The above is from Waaagh Mediko, found here. It is heavily converted, but a very effective paint job.
The one above is from Felix and can be found here.