>>96474105
>TQ
Vallejo mecha primer, black, through my airbrush. Then I base-coat the whole thing whatever color will be most annoying to paint, and sometimes I also do a gradient on that color if I think it will look cool, or a zenithal spray of a lighter shade of the same color. Saves me a ton of time. Usually on AdMech it's khorne and mephiston red, occasionally silver if the model has a lot of metal details that will be a pain to paint by hand.