Your feedback makes me speechless! Thank you very much!
I like your interpretation of the mult-colour streaking. I could never buy the notion of a two tone bottom of the wing.
and
I'd like to learn more concerning your logic on the wing colours
At first thanks for asking, I was hoping not to torned to pieces due to that coloring

I started with the usual green/brown on upper side, the freshly painted wing:

The oils were not yet dry and a friend comes around the corner with a different theory:
- there is the known Fokker parts list with wood stains: brown, green, violet and blue
=> the known upper side green/brown, below violet and blue
But does it really make sense? Unusual. And brown/green was not allowed due to likelihood of confusion with french aircrafts.
We know the e.g. Albatros schemes of that time with green/violett on upperside, blue below. Can be used here too.
The remaining question is: what about the brown wood stain from the parts list?
But who tells us, that the brown has to be on outside? I was told, that a wood stain improves the resistance against water, so it makes sense to use the brown inside of the wing. Fokker has trouble with condensed water in the wooden wings (which caused delamination and the stop of the D.VIII program due to crashes). So any additional protection is good.
I found that theory so consistent, that I removed the not-yet-dry green and brown oils immediately and started again with green and violet.
Cheers,
Frank