Have to qualify my entry a little bit.
1. Facial hair would be the starting point. Why stop there?
2. Newer lasers and combo lasers are now able to "kill the gray away", but will need a bit more info on that.
3. Will need a good conversation with a tech, or some other intelligent being before beginning, as hair roots are somewhat like plant roots. Inasmuch as plant roots prevent soil erosion, human hair roots, especially facial, play a part in how much our skin "sags". Then again, I could always go for a facelift when I turn 70?