Soak wood or chips.
Preheat Smoker to 225°F, add wood chips of choice for smoke
Score whole bologna on all sides into diamond shapes, about ½ inch deep, using the tip of a sharp knife
Rub outside of bologna with mustard.
Coat bologna in seasoning, making sure the seasoning gets into the score marks in the bologna.
Place bologna on smoke and allow to smoke for 2-3 hours, until outside of bologna is golden. Add more smoking wood as needed.
Brush bologna with BBQ sauce if desired, in the last 30 minutes of smoking.
Remove bologna from smoker and allow to rest for 10 minutes before slicing and serving.