I attempted to use Aircraft Coating Remover, and didn't accomplish much more than making a big mess.
I put the pipe in a bench vice and went at it with an electric drill, and a wire wheel accessory. It took a lot of time but results were great. After I was done I sanded it with fine grit sandpaper and gave it about 4 coats of high temperature clearcoat. The clearcoat only lasted about 4 or 5 rides, until roost blasted it off and it began rusting (from being on an open trailer driving in the rain).
I cleaned it up again with WD-40 and a scotchbrite pad (took 2 actually), and left it like that. The WD-40 cleanup is almost as good as the high temp clearcoat treatment, for rust prevention.
After you wash the bike, spray the pipe down with WD-40 (all of it) or it will rust. Best to wipe it down with a rag once you've given the WD-40 some time to dissipate the water. This will keep it looking nice as long as possible.