That's awesome !
Am all about polishing alum. Love the look of it.
If it was mine,, I would polish the top of all the fins also .
Those you just go over them with a bit of sandpaper first.
I use the fine Scotchbrite ''a lot'' also.
Crane ''used to'' make some pretty nice cams back in the day ….
Put a bunch of them in old school big twin Harley's,, & misc. Chrysler engines.