I used wet and dry sand paper from a 1200 grit upto 2500 grit with WD40. I cut the sanding paper about a cm wide and 2 inches long and jus' sanded it down by hand. Then i got some polish and worked that over the cylinder head on a small polishing buff on the end of a rotary tool.mint. i take it you just used sand paper and your finger? i am tryin to do the same, but not quite managed the polished finish look.