Very typical, and works quite well. You don't need a heavy coating, but just a light smearing will hold your rub onto the meat a little better than just directly rubbing the meat. I do it on ribs, brisket, AND butts. You will not taste mustard on the meat. For something even more interesting, try mixing 2 Tbs of yellow mustard with 1 Tbs of honey, and use that for your glue. You get just a slightly sweeter taste in the bark that way. Yum...
Keri C, smokin' on Tulsa Time