I don't know if it would help him now as it's been several months, but some say vitamin E oil helps with minimizing scars. You can use the kind you ingest, just break the capsule open and rub the oil, or just buy a small jar of the oil.

Pure shea butter is also purported to help. But I think some people are prone to having keloids, or those lovely lumps of scar tissue. I, myself, am one who is in that category.