Re:
I used Peek on mine, after very kindly being karma'd a tube of it.
Autosol is great, but it does tend to leave a black residue in the welds, whereas Peek doesn't, and overall it gives a better shine that lasts longer, from what I understand. Sold my frame on as it was just too big for me, but the Peek has proved brilliant on polishing up cranks, etc, so I'd go with that over Autosol given the choice.