I used to get ingrown hairs on my neck many years ago when I shaved daily, a brutal task which I decided was a bad idea.
The only way I was ever able to "fix" them was to place a sterilized pin under the loop, pull the ingrown end out and then tweeze out the root. The key, I think, is removing them early. In your case, PixieandElf, I'd suggest you turn this duty over to your husband.
Mrs. Alura has a scar from a biopsy on her left breast. For years, I've been licking it regularly to help it to fade. It seems to be working, although slowly. It would seem an ideal solution to your ingrown-hair caused scars.

Cheers,
Mr. Alura