I use a pretty sweet sauce. Put it on the ribs, get them back in the cooker and let it set. When they're ready to came off, I glaze them. I don't know the reciepe off the top of my head, but I think I might have found it here.
1/2 c jelly/jam of your choice
1 tsp dijon mustard
1 tsp???? can't remember - apple cider vinegar
Gives it a nice shine. Pictures in the Photo Gallery thread if your interested. Under "First Smoke in the new 22" posted on Saturday.