Paragraphix will be offering a nice decal and photo etch set for this kit. Mostly to detail the interior but it looks really nice. I'll post a link later.http://www.paragrafix.biz/
You should use regular foil it is easy to work with, I put two part epoxy on the back of the door for strength .
http://www.modelcarsmag.com/forums/index.php?showtopic=28615&hl=%2Bnissan+%2Bbeater
if you are sticking to an airbrush and waterbased paints a simple cardboard box seems easier . as long as you don't go crazy and paint for hours at a time .