For me it is a long time consuming process. Most of the hard work is done by hand. I started with 280 grit sandpaper and subsequently 400...then 600...then 800...and finally 1000 grit. After hand sanding I used a pedestal mounted buffing wheel and 2 different stainless polishing compounds...since I couldn't get all the areas with the large buffing wheel I then used a smaller buffing wheel on a hand drill...and then even smaller buffing wheels of different shapes in a Dremel tool. Once that was done I hand polished the entire system with Wenol white paste polish and hand buffed. It took me well over 200 hours to complete the job.
Once the pipes get hot they will tend to yellow...especially at the hottest areas. So periodicly I hand polish the pipes with the Wenol polish to bring back the polished stainless look.