Well, I am not an expert in chrome plating, but chromium is the element that is used in chrome plating to give it the shiny appearence. It is "steely-gray" in color so I fail to understand how it can be used to provide a clear coating. Perhaps it is just semantics, and "clear chrome" is not really clear. Please enlighten me on the subject. Your knowledge of the original GM processes is always appreciated.
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You may be confusing the Clear chrome (Decorative chrome) application used for appearance with: Hard Chrome Plating. High Wear, Low Friction, and Improved Corrosion Resistance. Hard Chrome plating (also known as “Industrial Chrome”) is applied to ferrous and nonferrous materials to improve wear and abrasion resistance, reduce friction, prevent seizing and galling, and to restore the dimensions of undersized parts ...
We use Hard Chrome in the restoration of Submarine rotating components to Fix shafts & fits and bores at the Naval Shipyard & You are correct Hard Chrome is NOT decorative in nature.