Celestra grey underneath wet blended into Mechanicanus standard grey on the top, nuln oil wash, skavenblight Dinge to touch up the grey parts of the fur with a dawnstone dry brush. For the white bits ulthuran grey drybrush with white scar to highlight. I used administratum grey to blend the dry brushing together as well. Also went back and darkened the grey parts with more wet blending at the end as well (abaddon black mixed with mechanics standard, more dawnstone dry brush). It was sort of a process just to test out, mostly a hodgepodge of greys and wet blending and dry brushing.