Not exactly sure what happened, but get a tube of tooth paste. Put a dab on a soft cloth and try to polish the dulled surface. That might help. If that does bring back the finish, make sure you wax it later with something like Mothers Cleaning Wax. That is what I use and I have never had a problem. And...

Next time, when attempting something new, try doing so on a small spot, that is out of sight. Doing so might raise all the red flags before any serious, or tragic, damage is done.

Hope the tooth paste thing works out.