Etching on Metals

I would like to learn how to etch on metals (gold and silver
specifically) but am unable to take a class. Can anyone recommend a
good book or two that clearly describes the process from which I can
learn these techniques?

Related Pages:

Library > Surface Manipulation > Etching

Advanced Etching of Copper, Brass and bronze

Better & Safer Etching - Metal Salt Etching, Resists & Resist Removal

Etching with PnP Paper

Etching Options for Champleve

Photocopy Transfer Etch

Carrie
Carrie Otterson Designs