Thanks!
I've been asked about my methods, so I'll tell a little about it.
I've used only Vallejo acrylics, as they're easy to paint both with brush and airbrush. These are same paints I've used for my plane and smaller scale model airplane (non-flying).
The first process was needed to make the WSF-material smoother, as it's quite coarse at first. Some people have used a thick layer of primer or some other paint or lacquer to do this, but I wanted to keep the paint layers as thin as possible, so it wouldn't add too much weight.
First I painted the model with Vallejo grey primer, spraying it with an airbrush, so I get smooth even surface and could easily cover even the deepest grooves. After that I sanded the surfaces I could reach with real fine sandpaper (I think it was 600 grit wetsand paper, but without adding water). But I see no reason why you'd absolutely need airbrush, as you can just sand it smooth and use a bit thinned paint. Then I painted it again, sanded and after third layer of primer paint, I thought the parts were smooth enough for primary colours. I left the models to dry after this for a few days.
First I painted the pilot with leather brown mixed with black, as a darker base color for the pilot and olive green mixed with black for the seat/batteries and pure black for the intrument panel.
Next I painted all the parts with a thinned primary color, keeping the grooves darker. Face got skin color, seat belts got khaki, leather jacket got a mixture of leather brown and "hull red" to make it a little more red. Metal parts I painted black.
Shading for the pilot was done in layers, with very thinned paint, so each layer was a bit translucent. I started with the darkest shades, using lighter and lighter color in each layer. I didn't use that many layers some miniature painters use, as the model doesn't need that accurate details. The last and the thinnest layers were primary colors mixed with a little bit of white.
The seat, batteries and the instrument panel were drybrushed with only a couple of passes. Last was the metal colors and little details like pilot eyes and scratches on surfaces, which I decided just to paint with one layer, as they were just small details.