Anyone polish an LA timing chain cover before?

there were all kinds of razor sharp casting lines that I had to grind off, but the red followed by black scotchbrite wheels did quick work to even everything out, then some 1000 grit, some black compound followed by your favorite metal polish. go easy on the red wheels as they are pretty aggresive on soft AL. Its a difficult job with all the nooks and crannies so I just polished the high visibility spots that were accessible with an 8" buff on a buffer.