Introduce foreground detail
Now I finally begin to add detail to my foreground X-wing. For this I use a photo of scratched-up metal on an Overlay layer. I make sure to desaturate the metal texture as well as tweaking its levels until I have the desired amount of detail.
Depicting car crash art
This X-wing was on the losing end of a dogfight and it needs to look like it. When I find a photo of an abandoned car with what feels like the right kind of damage, I cut out the bit I want, drop it onto my X-wing and cycle through my layer styles until I find one that works well enough to paint over.