Don't know about the BD Mark III, but the hands, neck and waist of the original Mark III are all made of the same material that eventually fades in color with time, depending on where the fig has been displayed. And I'd be willing to bet that even mere oxygen plays a part in the discoloration of these parts. This goes for EVERY single Mark III ever released from HT. It's just a question of WHEN it will fade, not if.