From what I learned (remember) from Andy at BoatworksToday.com, polishing paint can be a bit iffy. Not all paints are thick enough or establish a hard enough surface to handle polishing. I would try in an inconspicuous place on the boat to test your product, technique, and tools. It can be easy to burn through the paint.
You might check out Andy's site to see if there are any ideas to help you.