The cannon painted up quickly. Honestly, the longest part was waiting for the washes to dry.
I primed it with vallejo grey airbrush primer.
I brush painted vallejo ultramarine on the shoulder and gauntlet.
I painted the gold areas with a base of vallejo beasty brown and washed the gunmetal with GW Nuln Oil.
I painted vallejo gold onto the brown base. When it was dry, I washed it using GW Agrax Earthshade. I painted the power cable with Vallejo gory red, then highlighted it with vallejo blood red.
I applied a wash of GW Nuln Oil to the grey areas. I used GW cold grey to "chip" the blue paint, and made a highlight pass on the blue areas with ultramarine and white. I also applied 3 washes of GW Agrax Earthshade to the end of the barrel.