As you suggest panel support is an element to my caveat. I have a Mercedes SSK replica with a "coffin" four panel hood in aluminum. The two top panels are joined by a piano hinge and wrap across the radiator shell and cowl, then down the sides. The side panels are louvered flat sheet. Dzus fasteners at the corners and mid-panel. In 18K miles the Dzus attachments on the side panels were all wallowed-out. I had to TIG patch the holes and replace the Dzus with Well-nuts and 1/4-20 screws. The Well-nuts provide a clamp load and rubber isolation to control (some of) the NVH.
BTW the hood panels are isolated from the cowl and radiator by leather strap segments, and further secured with a buckled leather strap. 1929 period correct. Not for you.
jim

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