Separate wing joints: Locate the joints between the drumette, the flat, and the wing tip. Using a sharp knife, slice through these joints on each wing. Reserve the wing tips for making chicken stock, and place the drumettes and flats in a large container for brining.
Combine 2 quarts water and 8 Tbsp kosher salt, ensuring the salt is completely dissolved. Add this brine to the wings, ensuring they are completely submerged. If you need additional brine, use a ratio of 4 Tbsp kosher salt to 4 cups (1 quart) water. Cover and refrigerate for 2-5 hours.
Drain wings, discarding brine. A few at a time, dry wings thoroughly with paper towels. The final crispness of the skin will depend on how dry the wings are, so make sure to dry them thoroughly. Place wings in a large bowl after drying.
Combine baking soda, onion powder, garlic powder and cayenne pepper in a small bowl. Sprinkle this mixture over the wings a little at a time and toss to evenly coat.