I would suggest colors that will really bring out the detail.
First - I would try a mix of white and silver - mix them together - and dry brush very, very lightly on the folds where there is texture.
Second - Mix a touch of red and black - I would try and get a very, dark red/maroon color - dry brush over what you just did after it dries.
Third - If necessary, after it all dries - add one last touch of the white/silver - maybe add a touch of black afterwards.
Basically this is to try and bring out just a touch of detail.... use a very thick headed brush when doing this, and after you barely dab it with paint, first brush the head against another surface (like a paper plate) to get about 99% of the paint off of it. You want to be forced to press the brush hairs hard against the figure to even get any paint off of it. Repeat over and over.