Jason, I recently copper-leafed a frame for my bathroom. I used an old distressed frame with a nice beveled mirror that I found at a yard sale, $2.00! Sanded it and cleaned the surface with TSP, you can find that at your hardware store, follow diluting instructions.
Copper foil and sizing can be found at most craft or hardware stores. Do it just like gold or silver leafing. Newbies can do it too, just follow the directions. You might want to practice on one first before you do a customer's, if you've never done it before
It was fun, and turned out nice. I finished it with a stained varnish coating to give it an old look. I got on a copper leaf streak and leafed the bathroom fixtures, light fixture and switch plates and towel bracket.
I would be confident to do one for a customer.
If you do find a copper oval frame, please let us know.
Good luck and have fun if you do it yourself, and then send us pics!