But I thought I should try it myself first...
Using an old coffee brewer, Citric acid, Zinc sheet metal and a modified battery charger (made it a constant 1 amp source).
I started with a spacer to the rear wheel.

The result.
Well a rather thick coating on the outside, nothng on the inside. Don't think I could have done much better with a "semi pofessional set" - or could I?

And after some brushing

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