A couple more experiments...
Here's two more. The sunset one is interesting, although the lighting is pretty conjectural...I have no idea where the light is actually coming from in the photo. It might be interesting to backlight that one and reshoot it.
Stuff I have learned so far:
1) Matching color temperature is as important as matching lighting...maybe even more so
2) 1/48th scale rivets are generally just too big and will bust the scale if they are visible
3) Sometimes a crappy photo is more believable than a good one
4) Textures can bust the scale. The camera will find everything you did not feel like sanding.
5) Chrome is a PITA. It reflects whatever is around it, and that is typically not what is in the background photo. I imagine shooting outdoors would work better for highly reflective stuff.
Anyway, enjoy. Comments welcome.