The guy wears a helmet most of the time, and yet he hasn't bothered to heal the multiple scars on his face! So maybe he's some kind of tough guy who wears them like a badge of honor (even though he rarely shows his face), but there you go.
There was also that weird pink Yoda-esque alien on the Jedi Council that has some kind of scar over his eye.
It could be they have the tech to fix these things but for whatever reason people don't always avail themselves of it. And of course we can't forget the example of Luke's face in ESB. But I guess you could argue the Rebels just don't have the best face healing tech available due to cost, parts, etc.
Anyway, that may or may not be of interest to anyone, I just figured I'd jot it down just in case.
