I saw a similar question but it didn't give me an answer that helped. I recently began to replace the faucets and spout in one of out bathroom sinks. The marble that was covered by the previous chrome faucets is discolored and my new faucets don't have a large enough diameter to cover the stain. Here is a photo of what it looks like:
I've tried marble polish, bartender's friend, and a stripper for marble to no avail. What can I do to get rid of this stain?