We don't peel the entire face at the same time as a face lift, because I don't want the skin to be peeled in an area where surgery was done underneath the skin.  During the face lift, no surgery is done underneath the lips or the front of the chin, so that area can be safely peeled at the very same time, sometimes saving the patient from an extra trip to the operating room, and allowing her to hide out while she heals from both operations at once.  That arrangement is more respectful of her time.