Preheat the oven to 425°F and move the oven rack to the upper-middle position.
Line a baking sheet with foil, place a wire rack on top of the foil, and spray the wire rack with non-stick cooking spray.
If the wings are not already halved, cut each wing at the joints into pieces and discard the wingtips. Pat the 4 pounds of chicken wings dry with paper towels until surface moisture is removed.
In a small bowl, combine 2 tablespoons aluminum-free baking powder, 3/4 teaspoon salt, 1/2 teaspoon ground black pepper, 1 teaspoon paprika, and 1 teaspoon garlic powder.
Sprinkle the seasoning mixture evenly over the dry wings and toss (with tongs or clean hands) until all pieces are evenly coated.
Arrange the wings in a single layer on the prepared wire rack with the skin-side up, leaving space between pieces so air can circulate.
Bake for 40 minutes total: after 20 minutes, use tongs to flip each wing so the other side faces up, then continue baking the remaining 20 minutes, until the wings are crisp and browned.
Remove the wings from the oven and let them rest on the rack for 5 minutes. Toss with hot sauce if desired, then serve.