The first picture is a detail of the face in progress - it looks kind of ghoulish at this point, but I wanted to show how I did it - something I worked out. I'm doing this in basketweave, of course (also called "diagonal tent stitch").
The arrow on the left points to where I've stitched over the eyebrows and eyelids in preparation for putting them back in with backstitches on top with just 2 plies of DMC floss. This is something I observed the counted X-stitchers doing years ago - an interesting technique, and it works well on needlepoint in this case.
You can see only two little dots remaining where the eyelid was. I left the lilps bare, as they will have pink tent stitches.
The arrow at the lower right points to basketweave in progress so you can see that it goes continuously up and down the diagonal, just skipping where there are already stitches or where it needs to be left bare - as the mouth. This makes a much prettier surface than it would breaking up the areas. These scans don't really show the color or sparkle as well as a photo would, but late at night the light isn't good enough to do it well either.
The next scan is what I've done so far, and it's so entertaining at this point, with the colors being added, that I hate to put it down to go to bed. Oh well.
Be sure to check out The Cape Stitcher today, as I think she might have some of her angel stitched - I'm anxious to see it!!