Remove and burn any excess feathers from the wings and grease them evenly with the mustard. Season the wings with the rub. Ignite the barbecue in indirect mode at 140 °C (284 °F). Cook the wings for 35/40 minutes until they reach 78 °C (172 °F) in the middle. Finish cooking and serve the wings along with barbecue sweet or spicy barbecue sauce.