cool stuff there, that old sorcerer looks wicked painted!
i like the use of the sand as manky nurgle manky stuff, i have a small suggestion regarding that and its a one FW use a great deal.
brita filters (can be used or fresh), just crack one open and leave in a warm place for a day or so to dry out a little. all of the little carbon and other pellets are perfect for patches of infestation and stuff and as FW do, rivets!!!!! its fiddly but thats how FW gets their tiny rivets on stuff