Haha thanks Jeff, the reason is that I actually painted it's underside and engine bay for 10 years ago So the paint are easy to take of!!I think the underside of your car is cleaner than the top side of any of mine!
Your plan makes sense to me. I always thought thebest way was to complete the car and road test it and get everything to your liking, then blow it back apart and paint and finish any body work.