These two Reaver titans are part of an ongoing Adeptus Titanicus army build and have been added to grow the 'mid section' of the force. 

These models were part built before undercoating with greys and silvers before and Airbrush was used to achieve the majority of the highlighting. 

The grey armour was achieved with different stippled layers of grey over the top, slowly getting light with each pass as to create the mottled effect seen on images of the Legio Gryphonicus Titans.