I thought about aluminum, as I am an aircraft sheetmetal fabricator by trade, but even the idea of making it from aluminum seemed like a bad idea to me. There was just no way to ever make that look good. I dont like cobbled up crap, or homemade science project looking stuff. Then the idea of making it out of fiberglass popped up from seeing how people make the custom moulded speaker enclosures with fiberglassed cotton fabric over particle board to make the shapes. Then I thought hmmm, why not make a mould with a release film, use grade A cotton fabric and once the shape is made, pop it off and fiberglass the Inside. And so i did, and it turned out great.