Can you not get away with shooting ships against black? It shouldn't be too hard to matte around the outline since you're not (I assume) going for any kind of ultra-stark lighting, and this will mean you can avoid any green glow from the cloth. Or are these fly-bys not in space? Sorry, I haven't caught up on the whole thread yet.
Oh, and keep your shutter speed at 1/50 ;)
DE