I had a few gray chin hairs that grew over an inch long if I didn't pluck them. Since there weren't many it wasn't a big deal to pull them. Problem was that my eyesight isn't as sharp as it used to be so the hairs could get pretty long before I would see them or think about them and everyone else would be seeing them long before I would.
I went to a Chiropractic office that has both a laser hair removal machine and a electrolgy machine. Electrolysis was chosen for me because of the type or color of the hairs. It has been almost two years and looks like it worked.