My Trike build-or not

[Manky Monkey]

That's interesting. Often seen that finish on new parts but didn't know anyone did it as a service. What's the coating exactly?

[hunter]

It's zinc,and i think it's called yellow zinc,
the callipers in the pics are brand new and the Finnish on them is also zinc but it's called clear.
I had them done in yellow because the yellow seems to be more rust resistance.

[Manky Monkey]

With the right coloured paintjob, that could make a really interesting finish on a bike. A trike done in various metal finishes, rather than paint would look cool.