This kind of aggressive behavior shouldn't be tolerated in any way. You do NOT want this chick teaching the others to peck at your face. It will if they see it doing that all the time to you.
You might want to try what I do with all my chicks, roo or hen. From day one, I spend time socializing with them like normal, with treats and perching, BUT every single chick also spends time in my hand on their backs. They'll protest at first because it's a very vulnerable position for them, but keep holding them for a few minutes each day, several times a day. Make sure it's not a scary experience by giving them bellyrubs and keeping a friendly tone with them. This treatment will establish their trust in you (clearly you arn't going to attack them if they spend every day with their bellies bare to you, and are still fine), but more importantly, it will establish your dominance to them.
For your baby, it might be too late in his/her life for this to work, but I'd start trying asap. Put on leather work gloves, and hold him upside down on the palm of your hand. Use your fingers as a gentle cage around him so he can't flap or stuggle and hurt himself. From what you describe, he might attack your fingers, but who cares since you have gloves on
. Eventually he'll figure out that resisting and pecking at you doesn't work, you arn't frightened of him, you arn't going to hurt him, and that you are dominant to him.
I've used this method for years, even back in the day when I could have roos. All of my roos have always respected me, and live in fear of ever challenging me since it will result in embarrassing bellyrubs in front of their ladies.
Good luck! If it's too late for him to learn respect, remove him from the flock immediately. He WILL teach everyone there to try to injure people.