: There is a chance you won't need to do anything quite so drastic.

: The hull has deformed because the timber has been swelled by the
: moisture on the inside and the glassed side has stayed about the
: same.

: Give the hull time to get rid of all the moisture before you do
: anything drastic. When the timber on the inside dries out
: enough, it will return to close to its original shape. Having
: the forms back in place should encourage it to move in the
: direction of the shape you need it to be.
I'd agree with Allan - DON'T get any more water in there: let it dry out. Helping the hull to return to the original shape while it dries (with straps, or whatever) will improve your chances of retaining the form you want. It will still float, even if it doesn't follow the plans to the last mm.