One of the things I utterly hate doing is shading on vehicles. There are so many recesses that manually shading them is what really makes me hate painting them. I came across this video and it really appealed to me as it makes shading so much more convenient:
I applied this to my Stormraven in the following steps:
1. Primed the model black using GW's Chaos Black primer (I find this primer to be the best spray primer for matte black. I like P3's spray nozzle, but GW's formula works best for me) then I airbrushed Vallejo Grey Primer, covering it completely.
2. Using a mix of GW Fortress Grey and isopropyl alcohol (50/50) I airbrushed just the raised areas.
4. Then spray Blood Red over the entire model in thin layers so that the shading underneath was still apparent.
The overall effect was astonishing. I wish that the effect was more apparent on the last photo. Apologies for it not coming out clearer.
Iwata Eclipse CS airbrush
Badger compressor (model unknown)