I'll change out the head tube and seat tube decals with plain black ones as the white ones get lost on the polished frame. Head cups, seat clamp and rear hanger clean and reinstalled.
It's starting to look like a bike again!

But the frame looks nice, although the bare aluminium will take a bit of working to make it more finished looking. I've decided to polish it as much as I can and leave it that way, no painting. I know bare aluminium can oxidize if not taken care of, but a good hard wax should protect it for the most part meaning it should only take a light polish now and again. I started with the head tube, since it's the area with a lot of welding. Ok the bottom bracket will probably be the toughest area but I don't want to put myself off polishing straight away.