Here’s something I didn’t know about. Radio geeks and hobby audio enthusiasts use PCB copper cladding material to fabricate handsome project chassis. The main method of assembly is soldering. In this PDF tutorial from QRP Builder, a small chassis for a radio transceiver is built, cut from a 24″ X 36″ piece of Grade G-10/FR4 Copper-Clad Garolite sheet, clad both sides, 1/16″ thick (from McMaster Carr). There are some really good tips in this article about building such project boxes and making sure the results are sturdy and handsome.
Fabricating a chassis from clad PCB board material [PDF, 1.6MB]