Here's what I do to make the chicken wings "crunchy" without breading or frying in oil.
Bake the wings at 400 degrees F for 30-45 min (till done -- middle no longer pink) then broil till the skin crisps up. I don't eat the skin anyway so it doesn't matter to me. Once the skin is crisp, drain & toss with hot sauce or whatever wing sauce you like.
If you still want some sort of "breading" try this:
Rinse wings with water
Dip in beaten egg whites (can add a bit of egg beaters if you wish)
Dip in bran flakes which have been pulsed in a food processor till fine mixed with seasoning.
Bake according to above. The bran flakes shouldn't be too carb heavy cuz you won't use a ton & they're better than flour.