Mod restoration in progress.

[VintageModMan]

Use SolvolAutosol and a dremmel with a pad on it.

Will need to coat it as not only will it tarnish, it will end up all over your hands with black metallic deposit.
Coating may be difficult as alu alloys generally need an etch coating or it chemically reacts and blows the coating off.

It's zinc alloy. Do you have any tips for an appropriate coating. I thought an enamel paint would adhere to it?

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[Oomee]

It's zinc alloy. Do you have any tips for an appropriate coating. I thought an enamel paint would adhere to it?

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I am no expert on paining, just what I have picked up along the way.
Did notice that zinc can be problematic, Krylon H2O paint might be worth a try.

 

[sorrynomore]

Very Nice work!

 

[Oomee]

Had an idea earlier, but couldn't post until now due to server issues.
It would be possible to electroplate it too, can get kits online for different plating metals.