Understood, and good examples SD... but I framed the car as shown setting the lens a bit long since any closer the flash was too much, and cropped entirely from the bottom. With light fading fast I took 6 photos, this was the only usable one. The sky looks fabulous in the others but the car all but disappeared... as it got darker I kept trying the flash but resulted in what you'd expect, flare on all the shiny bits.
Didn't mean to go OT; this discussion should really be on the other thread.