None of my references say anything about a plating on these, but it replaced the model 60 which had a chrome plated bolt, bolt handle, and trigger.
Use of feeder layer.
Yes, silver plating can be salvaged through a process called re-plating. This involves stripping off the existing worn out silver layer and reapplying a fresh layer of silver onto the base metal. The item can then be restored to its original appearance.
Chrome plating was discovered by George Sargent in the early 1920s. He observed that applying chromium to steel tools would increase their resistance to corrosion and wear. This led to the development of the modern industrial process of chrome plating.
it is a plating of immersion
This will depend on the material you are interested in plating with. As the price of gold goes up, even plating with gold will become more and more expensive. Plating with silver will be less pricey than plating with gold.
The main difference between alkaline zinc plating and cyanide zinc plating is the type of bath used in the plating process. Alkaline zinc plating uses an alkaline electrolyte solution, while cyanide zinc plating uses a cyanide-based electrolyte solution. Alkaline zinc plating is considered more environmentally friendly compared to cyanide zinc plating, which contains toxic cyanide compounds.
Gatero's plating offers a nice chrome plating kit for an affordable price, and you can buy them online at http://www.gaterosplating.co.uk/Replica-Chrome-Plating-Kit.php. They also have other plating kits.
Gold plating depends on the spot price of gold. Gold plating is extremely thin, but gold is expensive too.
While chrome plating on teeth is not accepted by dentists, at least not yet, gold and silver teeth plating is common.
There are various plating services around the world, from what i have seen and found, the top places are: Ashley Jewlers, www.ashleyjewelers.com/services_plating.html and, Artisan Plating, www.artisanplating.com, and lastly Gold Plating Services, www.goldplating.com...
Many car and body shops might be able to do chrome plating. There are also specialize shops that specialize in chrome plating.