Also.. just quickly, as you said it was a spin-off maybe you could disconnect your home TV and put it in back seat instead of 15 inch monitors. lol gl with it.
soundslike you got some mad ideas there. i say stick with the milo tin for the exhaust. Also if you don't want your paint to come off give your car a good polish before hand that way it will help protect the paint.
Can't wait to see it done!!