I got this idea from a blog called Project 22 - here. I didn't end up doing the entire back of the shirt because it required a lot of rivets -- more than ended up being in a couple of packages -- so I did a different design of my own. I just mapped it out first to see what I liked before I started putting the rivets through the shirt.
Make sure you pay attention to the tightness of the fibers in the shirt that you purchase. I bought a shirt that had a really loose weave and it caused some problems when I went to close the rivets as there wasn't much for the claws to grab onto and I had to redo some of the rivets.