laminated foam panel

[doug7488]

Hi, Joel -
I am looking to replace the interior deck hatches on my 42' chris craft
existing hatches are 3/4" plywood w/ 2" x3" framing / 1/4" ply finish on bottom - they are very heavy to move about
the clear span is 30" across the supports
can you recommend a laminated panel for use? / edge finish?
I am mainly interested in a weight savings
In the future I am also planning on re-decking the cockpit.
I plan on incorporating a slight crown across the 10' wide deck
Is that possible with laminated panels? -maybe (2) layers of 1/2"?
Any update on the smaller finished hatches?
thank you for your time
Doug