: Thanks all for the advice. Since I'll need a border between both
: halves prior to fiberglassing (I assume wax paper) I'll go ahead
: and pull one half off, get the other firmly tacked, install the
: border, then do my best to line them up. The deck is
: significantly farther off the forms than the hull so I'll focus
: on un-flattening it.

Wax paper? maybe a century ago...? I used plastic - waste bags in fact. But the kitchen wrap used to keep vegetables fresh might be easiest, in hind sight. thin and clings all on its own. as always, test to see if epoxy agrees with it, not melting it or any other problems.

greetings,

risto