Great Fred.
I'm going to play with it a little before I attack the car. Compound curves present a bit of a problem, it looks like you can get away with mild compounding, but I'm not yet sure how much. Probably won't get to it until next week, I'm up to my eyebrows in work, kids and S.O., but will let you know how it comes out.
We are probably re-inventing the wheel here, I'm sure there are a bunch of guys out there who have used this stuff, but it will be fun to learn.
Bish