Yep, those scratches are evil alright! Seems like almost everyone on this board has the same issue with aluminum, those final super fine scratches that just don't seem to go away. Sorry I don't have any secret for you. Like I said I'm very new to polishing and I get great "2ft." results also, looks like chrome, but when you look at in in the bright light up close those super fine hazy scratches are there.
Look around for the posts on wetting the part, dusting with talcum powder and buffing with a clean wheel. This technique is supposed to help but I tried and didn't really see any difference. I am getting better results than when I first tried, so practice does help. I now use an 8 in. loose cotton wheel on a grinder and do several passes on the piece in a criss-cross pattern. This seems to get the scratches almost to an acceptable level, for me anyway. Keep raking the buffs too! That definitely helps. Good Luck, and whoever has the secret to getting rid of these damn scratches better come clean soon!
