First thing - these guys have a LOT of hard-to-paint places. Between their legs and behind their shields are particularly tricky to get paint on, but I guess in the end you can't really see them anyway.
Also to note about painting these guys - they're big. I had always kind of thought they were standard infantry units, but they're actually quite big - bigger than Space Marine Terminators, and probably as big as some of the light 'jacks from other factions.
I'm still chugging along, trying to get one of these guys painted everyday! Hopefully have the max unit finished by the end of the week!