No problem. Believe it or not, someone is your same situation was how I got my DB rings. He wanted a polish rings and sold his brushed ones to me. Then I asked why didn't you just buff the brushed ones. It cannot hurt trying it out. Worse case, you still trade or sell them.
If you have a dremel, buy some metal polish, and try it out on the back of the ring (no damage done if you screw up there). Then if it works out, you can post it on here for everyone else.
Good luck.