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Nice links, but making compound curves looks difficult, lot of steam bending or at least soaking involved.
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I don't think steaming or soaking is going to work with some of these materials. But cardboard—definitely. I bookmarked the Z-Plex page. Too bad they only recommend it for non-structural uses.
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Maybe I can blend different technologies and materials. For instance; start with a very light gauge and bendable conduit (plastic or metal), cover with a single plane bendable product (Monopan?), and for the complex and compound curves found at the front, back and corner/plane intersections use fiberglass over hand sanded foam or Z-Plex pieces.
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That's what the Trev folk did.
http://www.trevipedia.net/index.php?title=Main_Page
I've been experimenting with
Polymetal. I've run it through a sheet metal roller/brake/shear to assess it for the final build of a boattail.
Here's what's essentially aluminum skinned coroplast.
AlumaCorr