Step 5: The Finished Product.
I added some touch-up paint along the edges where the caps didn't fully cover and put a couple of screws and some piano wire on the back to hang it with. The finished piece (41" x 43") now hangs next to my bar in my basement.
This was a really fun, albeit time consuming, project. 540 caps = 90 six packs = ~$7 per six pack (depending on the brand) = ~$630 worth of beer.
I've started collecting caps for my next project -- if you own a bar and want to help out, collect your caps and mail them to me. Or if you're local, I'll come out and pick them up!