[Closed] Morgan Blue, what's in it? Paintstripper warning!

As above? Had my eagle cassette off today to service my freehub and while it was off chucked it in a bath of Morgan blue, just to get it nice and clean to go back on. Took the brush to it and it started bringing the black finish off the eagle cassette. Not a big deal in the grand scheme of things but a bit dissapointing as apart from a bit of putoline residue the cassette still looked like new after a year of use. So just a warning really for anyone who might do the same. I wont be chucking the rear mech in there though now. I thought the cassette finish might have been a bit tougher than that.