Time on my side, from No.600 then to No.1000 later to no. 1500 sandpaper, there is no shortcuts to polishing a chrome exhaust pipe. It does not take hours but days to produce the desired result. Just when I thought a brush chrome finish will look fine having used the no.600 sandpaper, upgrading polishing to no.1000 sandpaper brought out the shine. Still, there were still fine scratches to be seen if one wants to be hypocritical. When I upgraded polishing to no.1500 a mirror-like glaze will eventually come out. Finally, wetting the sandpaper even brought polishing to a finer degree. It was tiring but satisfying to ogle at the end result in the late evening.