My introduction to the thread was that last picture, then I went back and read the whole thing. My thought is that everything up to the penultimate picture sounds reasonable, but that last picture is scary!
If you want to know why read
CarBEN EV5 Full Sized Prototype Construction - 5 Seat Electric Car ..., around page 31 where he starts confronting the problems of fiberglassing over glued-up foam strips.
Were it I, I'd strip off all the foam and figure out how to attach it to the car. Wrap it with plastic cling film until it holds it's shape. Then use a thin material that has a finish surface that can be rolled into simple curves (to save hours of tedious finish work). Or dampen, slump-form, and dry cardboard.
Here's an example of a form made from gored flat strips.
See also
