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I was contracted by a church to make a 1:1 scale half model of the Ark of the Covenant. It had to be light and durable because it would need to be moved from time to time (ruled out balsa) so I ended up making it out of coroplast, insulation foam board and Aves Apoxiesculpt. Oh...and a couple cans of rattle paint (and no, it's not all gold...)