Trim off the wing tip. Locate the knob-like bone at the bottom of the drumette. Cut right underneath that bone to separate the drumette and flat into two pieces. Repeat for all wings.
Pat the wings dry with a paper towel. Sprinkle the skin with salt. Place in the refrigerator uncovered for at least eight hours and up to 24 hours to dry brine. For best results, 24 hours is recommended.
Stir together the baking powder, chili powder, brown sugar, garlic powder, black pepper, smoked paprika, onion powder, cayenne pepper, ground cumin and mustard powder in a small bowl. Remove the wings from the refrigerator and toss with the baking powder mixture to coat evenly.
Place the wings skin-side up on a greased wire rack in a baking sheet, ensuring that the wings don't touch to avoid overcrowding. Let the wings sit at room temperature for 15-30 minutes. Meanwhile, heat the smoker to 250 degrees F.
When the smoker reaches temperature, place the baking sheets in the smoker with a water pan. Close the lid and smoke for two hours.
Remove the wings from the smoker and crank up the heat to 400-425 degrees F. As the smoker heats, brush the wings with olive oil. When the smoker reaches 400 degrees F, place the wings back in the smoker and let the wings finish smoking until they hit an internal temperature of at least 175 degrees F, though they can go up to 180-200 degrees F for the meat to easily fall off the bone. This should take about another 20-30 minutes. Remove the wings from the smoker, allow them to rest for five minutes and then toss with your favorite sauce if desired. Serve with ranch or blue cheese dressing, celery and carrots sticks. Enjoy!