Alright folks, get those light bulbs going! Time to think outside the box!
Ships and boats count too so how about some riverine craft meant to play in the Med and/or Gulf? Maybe you some old DD or other small FF or FAC gets painted up for a special mission? Heck, maybe some old landing craft/ship is now serving as a ferry in the Med/Gulf and has been painted all white, has some massive sand filters, and is full of solar panels and other reflective surfaces to cut down on fuel?
Post Apocalyptic should offer a treasure trove for the Sci-Fi crowd. How about some Mad Max style vehicles? What about some desert racers and sail cars (anyone see Sahara?)?
Civie stuff too so how about some Baja racers or long range expeditionary vehicles turned into Spec Ops dune bugies?
Remember desert camo isn't just tan and brown. White, black, red, yellow, blue, green, and gray can and have been worked in so don't feel constricted.
Please feel free to add to this and above all be creative!
-Mike