I tried this a few months back when it first hit the forum. I can report that chocolate is not a terribly good polishing agent. I worked at it for quite awhile, but couldn't get a shiny enough surface with the chocolate. It also makes a really big mess. I hadn't thought of toothpaste though, that's a good idea.

Unless you are really bored, I would eat the chocolate and find a different polishing agent.

Greg