Speaking as an expert at making models, and considering I have the advantage of looking right at the real thing

It will be darker in shade than your normal skin tone.
It will need to be made to look 'dirty' ie in need of being washed. I suggest a shade two shades darker than the base shade. I hope you understand how to do dry brushing and washes.
You will need to likely add some reddish shading to the top portions and underside of the front.
It will sure be dull in surface as well, no shine whatsoever.
That by the way applies to Caucasian