Thank you Sall!
Today, work on different elements:
First, the engine: I've airbrushed Vallejo Oily Steel with a drop of black. Then followed a very strongly diluted spray of Oily Steel with Old Gold. Next phase will be the use of Citadel Colors brown ink.
Airbrush cleaning...
I've airbrusehd yellow on the propeller.
Airbrush cleaning...
I've airbrushed grey on the engine
Airbrush cleaning...
I've partially airbrushed (another kind of) grey on the rockets. I've to airbrush the heads next time
Airbrush cleaning...
...And enough for today