G’day Keith (@greenterrorz),
Having looked at a lot of D-9s, I would say that the difficulty is finding a ‘normal’ scheme, as in the official camouflage directive.
The JaPo books are the best source for understanding the differences between factories and the evolution over time.
All their profiles are based on, and accompanied by, photo(s) of the aircraft in question.
White 16 above is in vol 2, based upon 2 photos, and pretty much agrees with the above profile.
Their assessment is the upper wing and tail were painted overall RLM 83 or 81 and then painted with 76.
1 attached image. Click to enlarge.