Next time that coon stares you down, just look him in the eye, grin and say, "Mr. Coon, you do look like supper." He'll take off. If he doesn't, eat him. Marinate him in vinegar to get the gamey taste out. Coon, collard greens, peas and cornbread makes a good Southern meal.
If you are just looking to scare him away, paint ball guns are great for coons, opossums, stray dogs, cats, or whatever. They rarely come back after you've popped them a few times with paintballs.
Kill him with a pellet rifle in town, or a 22 rimfire if you live outside of town. We used to hunts coons a lot when I was a kid and we always carried either a 22 RF or a 20 gauge single barrel shotgun. You didn't want to tote anything heavy through the woods at night and if you coon hunt you are going to do a lot of walking.