Wanted to try something new and improve my airbrushing, so after watching a few tutorials I had a go at clouds. It turned out nicely and was quite simple, just a light blue background with a slightly dark blue gradient at the top, white for clouds with a little grey to shade the bottom and a touch of yellow for the sides for some colour. Most of the time was spent going back with the white to cover the grey or yellow when it was too much.
To improve I would try more colour, oranges and reds to blend in the yellows and go for a sunset effect, or show more direction in the clouds as if there was a strong wind.
Followed this tutorial from AirbrushTutor, who has a lot of great videos.