Thanks for the comments. The pastels included one of two metallic shades for a change, didn't photograph very well but looks OK in real life. I enjoyed using such dark paper.
I really like the juxtaposition of the finished and the schematic areas and the angle of the face three-dimensionally. Your use of the metallic pastels works very well. I find there's often a lovely silver quality to skin and you've brought it out very well. It must be quite tricky to use metallics and not get them garish, so congratulations. I really also like the sensitivity with which you've rendered the flesh, especially on the near cheek and forehead and around the eyes. Very nice work.