Preheat the oven to 400°F. Line a baking sheet with aluminum foil for easy cleanup.
Spray the chicken lightly with vinegar, then pat it dry with paper towels to remove as much moisture as possible.
Prepare the spice rub. Mix until combined ( salt, paprika, garlic powder, onion powder, ground black pepper, chili powder, and herbs).
Drizzle a little olive oil over the chicken legs (or leg quarters) and rub to coat them evenly. Carefully lift the skin and season underneath with the spice mixture, then rub it in well so the flavor gets right into the meat.
Arrange the chicken on the baking sheet or wire rack (if using) in a single layer, skin‑side up, making sure each piece has about an inch of space so they crisp up evenly.
Bake for 35–45 minutes. The cooking time will vary depending on the size of the chicken.
Check for doneness using an instant-read meat thermometer inserted into the thickest part of the meat near the bone. Aim for an internal temperature of 175°F–185°F (79°C–85°C).