you might check out the link at bottom left of blog page on quilting people.
and hope this info helps...
My basic ground rules I use for quilting body parts/faces
1) a) You can quilt very little or alot... seldom does anything in between work lest you are looking for wrinkles to appear in faces, etc.
b) Once 1)a decision made.. lest you are working on a small piece... be aware of need to evenly distribute quilting across entire quilt.
In other words... in order to avoid surface distortion.... a lot of face quilting would usually dictate more dense quilting elsewhere as well.
2) Consider using quilt lines that flow with contours of skin surface... like up and around puffy checks, up over nose bridge and then down on opposite side likened to the starting point on the opposite side.
3) Use graceful beginnings and endings at either side of the face, arm, leg... i.e. curve the ending to line alongside (e.g..) the vertical side edge of the leg.. or face.... this way.. one doesn't really see a start and stop point.
4) I generally want no more than a 40 wt. thread on skin. It works for me... and I like something with a slight sheen...eg poly
5) work quilting from quilt center (near middle of quilt.. outward/upward/downward so as NOT to surround any area /island of unquilted space. An island of unquilted surface will likely pucker and not quilt flat.