Originally Posted by
RBMike
Wipe off the loose stuff, take the pipe outside & place it on a peice of cardboard (you will have to throw the carboard away when done). Spray the pipe with EASY-OFF oven cleaner & let it sit for 20+ minutes then hose it off. You may need to repeat if it was really gunky. Were rubber gloves when handling the pipe with the Easy-Off on it. This work great & requires almost no muscle work. DO NOT USE EAZY-OFF ON BLACK COATED PIPES, it will take the black coating off.
Don't use EASY-OFF on ANY pipe if you want it to have a nice finish. It's LYE, very caustic, will take off the finish no matter if it is hard coated or polished. (It works great for "de-anodizing" parts that are too "bling" though!)