Can I hide my chin implant scar with a hair transplant?

You can hide your chin implant scar with a hair transplant surgery and also SMP. This has been done on several occasions.

ota457,Facial hair transplantation employing scalp hair work very well. You did not mentioned how long after your chin implant you are. Scars need to be given time to mature before repeat surgery. Since you are in Los Angeles visiting Dr. Rassman for a consultation would be good idea. All the best.Bernardino A. Arocha,MD

Transplants can be successfully placed but in most cases I would prefer to do a scar revision which is a much easier and quicker treatment.

You can use body hair to do a beard or mustache hair transplant . You have to make sure they are the Sam texture and caliber hair. It is a very meticulous and involved procedure, but If it is done by an experienced hair restoration specielaist the outcome is very natural. 

Beard hair transpalnt is very possible and depending on the size of the area, easily done with FUE grafts.  Many hair transplant surgeons like myself will specialize in this type of surgery (although some doctors prefer NOT to do this surgery) so check out who has a special interest and experience.  Good luck!