Zenithal airbush prime from top down with White Primer or with a rattle can using Matt White
Airbrush or brush Imperial Fist paint over the areas you want to be yellow
Paint areas you wish to be dark blue/jade with Tyrian Navy
Increasingly add Dark Jade Jade into the Corvus Black to provide a highlight on the cloth elements
Paint a 1:1 mix of Burnt Iron and Iron Warriors onto the metal elements of the model.
Alternatively, airbrush Burnt Iron directly onto the miniature