Combine rub ingredients in the specified quantities and liberally apply to the meat and skin side.
2 tbsp brownulated sugar, 2 tbsp white sugar, 1/2 tbsp diamond crystal kosher salt, 1 tsp celery salt, 2 tsp smoked paprika, 1 tsp granulated garlic, 1/2 tsp granulated onion, 1/4 tsp mustard powder, 1/2 tsp medium grind black pepper, 1 tsp ancho chili powder, 1/2 tsp chipotle powder