James, I've used that, too. Works very well, but I find it a little "messier" to use than the pasty Mother's Billet. The Cobra Valley Metal Polish is more of a soupy liquid and it really is good stuff. I use it on my ceramic coated sidepipes and other large areas where I don't mind a little mess hitting the garage floor. It's amazing how many concoctions are out there that work!
-Dean