I picked up a couple of estate pipes on the bay, nothing fancy at all. I am just hoping to get a couple of good-smoking yard pipes fixed up. They have significant carbon build-up, to the point that the chamber is "conical" down to the bottom of the bowl. I have my pipe tool scraper, and a dremel. Which should I use to knock some of that cake? Not looking to go back to bare briar, just want to take the top layer off. I don't have a reamer. Next best trick??