Color for Fuel Tank, Strap and Bolt?

I'll start by saying I'm not doing any sort of a concours restoration, I Just want it to be close/similar to original...


1967 Barracuda

I'm installing a new fuel tank, strap and bolt in my car and wondering about correct colors.

Does the tank remain unpainted (galvanized)?

The strap I purchases is unpainted, should it be painted black?

The j bolt is unpainted, should it be painted black?