How to shine a dull mark on granite worktop?
Countertops to my knowledge are polished to 3000G and polished with flowing water using special equipment. I have made my own tops and finished the edges using dry polishing pads, and I have seen a minor difference. Your biggest difference you may see is the dull surface from the sealer being removed from your polishing.
Find yourself a silicone based, color enhancing stone sealer, and it may do just what you need.