I had problems with painting dark skin, when trying to make the Khemrian rider look Arabian – so I took a different approach this time.
Rather than use dark brown, I used a dark reddish brown – i.e. Rhinox Hide; which looks more natural:
To paint dark skin
Basecoat: Rhinox Hide
Wash: black + dark brown
Layer: Rhinox Hide + small amount of Mournfang Brown
Layer: Rhinox Hide + Tau Light Ochre (2:1)
Edge highlight: Rhinox Hide + Tau Light Ochre + small amount of Khaki
Paint extreme highlights on areas like the knuckles, by adding Ushabti Bone into the above mix.
Glaze all over with a very thin layer of Rhinox Hide; and then with Seraphim Sepia.
A difficulty posed by painting the skin dark is that if you paint the surrounding areas in light colours, it detracts from the main body of the model – so a bit of planning beforehand is helpful.
Alternatively, a fair bit of trial and error….
For the scheme of the overall collection of models, though, I’m going to try and move away from the European-Gothic theme, which tends be quite generic in Warhammer; and use patterns and colours from African, Middle Eastern, and Indian art.
You can see some of these motifs in the old Tomb Kings models – and the even older Al Mukhtar’s Desert warriors; but there’s not much to go on in Warhammer miniatures/artwork.
Thankfully, there is plenty of real world reference material around, to take inspiration from. I might make a post about this in more detail.