> Robert the way to produce the hull you are talking about would be to cover
> the mold in some sort of foam sheets these would then become part of your
> hull structure you could then blow your glass on the inside of the hull
> you cold also make foam or ply bulkheads and again blow your glass to them
> you will also need a strond keel and stringers.The outside of your hull
> will still be better layed by hand with matt and cloth as a chopper gun
> would leave a surface that would need a lot of fill to fair it. Concrete
> boats work well a number of boats have been commercially built here in NZ
> in the past and lasted the test of time . What about Steel ?

Steve,

Steel is good material and being a welder would be easy enough to use except for the fact of move the big sheets of metal by my self. I think it was alway ethier alum (1st choice) or fiberglass.