Antique World Mall and The Annex in Boise, Idaho, is that rare kind of place—a labyrinthine wonderland where yesterday’s discarded treasures become today’s most coveted finds.

It’s the antique store equivalent of those free samples at the grocery store, except instead of a tiny cup of pasta sauce, it’s vintage kitchenware and weathered wooden treasures beckoning you closer.

One material can create a multitude of products. Local businessman, Rene Lopez, owner of Rough Edge Woodworking, first ...