Galvanized Body Panels

[lwong@domain.elided]

I am fairly new to Scouts so here are a couple of question:

Which Years or models came with Galvanized body panels?
I have a 71, and the body panels (where the paint is chipped) seem to be
galvanized.

Were any non-body panels galvanized as well (i.e. floorboards)?

And lastly, do galvanized body panels require special primer and paint to
adhere to the zinc coating?

Thanks in advance.

-Les