Thanks for the positive comments.
For the faces, nothing special, but I never dry brush, I prefer using layers of paints, from dark to light flesh tones. For the eyes, I fisrt draw a black horizontal "almond" for each eye, I draw a second white "almond" into the black one: the resulting effect is a black-outlined white eye. Then I dip the extremity of my thinest brush (3/0), in a drop of thickened black paint, and I place a black spot in the eye, usually slighlty shifted from the center (right or left).
Hope this help (I am sure that you can find a lot of better explanations on dedicated websites.
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Edit: for the brushes : Raphael 8404 series (sizes: 1,0, 0/2 and 0/3), and the Vallejo Model Colors paints (although I occasionnaly use the GW paints)
Cheers,
Twinky