Hi Johan
I not going to get in the whole system of skin tones for now How ever, after the skin is painted,
Proceed to painting, the fur or hair which is airbrushed on gradually with Tamiya (fx-10) flat brown, the point here is integration, darker in the center mass and light as you go out. I always dull cote my stages as I go along, for two reasons: one is that it protects the work under and the second is that it creates an optical effect on the skin, a layered transparent effect.
When you spray it, it also keeps the chemical reactions or remixing of the underneath colors from becoming loose. And lastly I mix a batch of my good old soot, one part Tamiya flat brown /one part flat black, leaning to brown side and apply it in a wash; let dry, then dull cote at the end of every stage. Then I dry stroke with (fx- 15)flesh to revive the highlights. Once the highlights are reestablished, using a wash that contains more water then paint, I tint with the original color! I also use color pencils and inks for individual hairs.
Tip! The key to smooth skin is to rinse or wash with tap water and a bristle brush.
Gently scrub the figure, if you see a chemical reaction stop, or stop if you see the paint coming off!!! Let dry, and then dull cote -- I call this the wash technique.
I hope this helped a little!
Happy Painting
Alex
P.S. Johan Try using a grape color almost black for you dark tones on the African!
Forgive any typos