It looks good Geo. With the mottling, I would see if you can get the airbrush to work for you, but brush painted mottles are quite okay. The trick is to keep the paint thin. Practice your application. Do you have an old unused body or wing in your stash of bits ? I would use that as a practice sheet.
In the finish, when I did my RE 2000 Heja last year (which I am unable to find now in this place) I found freestyle brush painting was the best method of application . The mottles are undoubtedly tricky, but if I can do it........