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THE WHITE BITS On the Ila, these consist of; the head cloth, the shell ornament, known as an impande, worn on the front of the head and on  the chest and war-paint.
Shade Using only three shades for this colour I started with a mix of  Matt White and Ash Grey as the shade colour for the white.  Applied with the Insane Detail brush as the white areas are  quite small, and the war paint is a freehand pattern which  requires a steady hand. Getting this first coat of shade really is the key, if you can get this layer neat and tidy, the subsequent layers will be a breeze, and actually become enjoyable! 
Above & below. A mix of Matt White and Ash Grey as the shade colour for the white.
More shade Once you have done the shade you can paint on the highlights.  The second colour for the white is a mix of the shade with more  Matt White added in. then painted on over the shade, leaving  some of it showing, in a similar way to the flesh colours.  White The last highlight with white is err… Matt White, but mixed  with some an acrylic thinner and a tiny amount of water to get  the paint to flow easily. Flow of the paint is the key with pure  white; it is a matter of practice, as with all painting.   War-Paint Designs The pattern for the war-paint, I must admit, I copied and  embellished from the painted models that already appear on the  North Star site, and following Chris Peer’s description,  “Warriors painted their faces and bodies white for war, often in  varied patterns of lines and dots”. But you could do anything  along those lines or none.
Above & below. The pattern for the war-paint follows Chris Peer’s descriptions.
Below. The last highlight with white is Matt White