My last post was from a tablet, so I didn't give the full URL.
PolyMetal—High-density polyethylene (HDPE) with aluminum face and back.
PolyMetal Lite—High-density polyethylene (HDPE) with aluminum face.
I've experimented with rolling/braking/shearing samples; it's really stout. My local supplier is Multicraft Plastics. They quote $110 for a 4x8 sheet. It also come in 4x10 and 5x10' which might save buying a extra sheet for any given size project. So, 10 times as expensive as coroplat that's out of stock. Nudo have other products that might be of interest:
Basically aluminum skinned coroplast,I haven't got pricing:
AlumaCorr—Corrugated/fluted polypropylene copolymer with aluminum on both sides.
Quote:
Features and Benefits
Innovative white or black corrugated polypropylene core provides a lightweight, durable panel.
Finished with aluminum on both sides.
Excellent panel for exterior use as it will not corrode nor rust.
UL - Listed.
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1/4, 1/2 or 3/4" plywood skinned with vinyl:
WhiteWood—Smooth vinyl face laminated to exterior grade plywood (one or two sided.)