Is it possible to "redrape" neck skin as a "touch-up" procedure after SMAS facelift, necklift & platysmaplasty, 1 year post-op?

From what you describe, opening the submental incision and dissecting the skin in this area for some ways to remove a contour irregularity should be sufficient.  This can probably be done under local.  No skin excision can be done in this area because that may extend the scar to your mandibular border. 

Hello petaross,Thanks for your question.The chin incision is often a source of contour irregularities.It is possible to revise the incision and skin drape to get a smoother contour.  The more you redrape, the less the tension on the scar but the more the skin removal necessary.Depending on the amount of contour irregularity, redrape needs may be minimal.See your surgeon to determine what level of touchup might be necessary in your case.Your chances of success should be high.Good luck,Dr. Shah