I was wandering if anyone has use Balsamic Vinegar to rub on pork butt instead of mustard? I usually use prepared yellow mustard and then put my dry rub on it before I put in on smoker. I have got ahold of some aged (25years old) balsamic vinegar. It is really thick and coats realy good. It has a sweet taste but, it's not over powering. I think I will try it over Christmas and take some Qview so ya'll can see the process of it.