"Started with 80 grit then 400, 800, 1200 and 2000. Finished with metal polish."

Wet Sand, wet the sand paper and the surface you are sanding, keep them wet. the only way you can really mess it up is if you dont take your time. if you rush, it wont come out right and you will most likey scratch the finish of the pipes. post some pics when your done. Good Luck.