none of that
wire wheel on a bench grinder to get the gunk off
then sandpaper starting at like 40 and going up to maybe 1000
(start at 40 so you can flatten all those casting/parting lines)
then buffer wheels on the bench grinder with whatever polish or jewelers' rouge or whatever is appropriate for aluminum
just sit and listen to the radio or watch tv and spend some time with your hubs. it'll take a while.