I primed and put the first two basic colors with the airbrush.
I used the vallejo grey primer. Then I painted jacket in khaki. After the first khaki layer i added white and sprayed from above so as to produce some highlight.
The result is not exciting. I should have added more white to have visible highlight. I also forgot to paint in khaki the gaiters...
Using airbrush makes the whole process quite quick compared to brush painting.
Lessons learned: It would have been preferable to paint the green first and the khaki later.