Got one in the mail today. I was a little leery at the photographs, and I didn't pay much for it. I had a sixth sense however, and bid on another much better shaped example. I stuck it in the ultrasonic jewelry cleaner after I filled it up with water. That cleaned it up rather nicely and easily. I ran it through 2 cycles, and the amount of gunk and dirt that came off of it was amazing. Upon closer inspection, I saw that the can opener tip is broken off. Ding for intuition.
Rather amazed at how deadly these pliers are however. Holy smoke, those pliers deploy instantaneously. No wonder they have a lock to ensure you don't "hurt" yourself.