I love community. I was doing some work today and came back across Drakes Warlord on www.titanownersclub.com and saw how he did his "gunk" for they oil grime and to deepen colors.
What a nerve wrecking thing to do but what an effect. After coating some of the painted parts in floor wax I mixed up some Winton oils, burnt umber and ivory black with some spirits into a gravy consistency. Fully coated the bits, hit with a heat gun till dryish and buffed with an old tshirt.
I think I might switch the black for something not has harsh for the larger plates but the effect is good on the legs and head.