Scouring pad??? Its bare metal - so it needs bare metal protection, wax, laquer etc. 2000 Grit is very smooth, I'm suprised you got rid of any pitting in the wheel, I'd start with a 400 grit, and work up to 1500. Then you'll find (eventually) you'll get a mirror finish with imperfections, use a mild abrasive metal polish compound (usually 2000 grit equiv.). Then go over the metal with a protective wax - it will usually need cleaning and re-applying 4 weekly to stay in tip top condition.