Not sure that ACF50 would help. I had some patches of lost paint and powdery corrosion on my Suzuki VX800 cases and applied ACF. The corrosion was killed but the bare alloy went a noticeably dark grey as a result.
Brass wire brushes do a very fine job of 'plating' rough surfaces: I found that just yesterday as I cleaned a corroded steel exhaust retainer. However, given that a Commando is a classic i.e. old, you could claim it has a bronze head!
I'm just wondering if boiling in baking soda might brighten alloy? Or do I mean washing soda?
Nick
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