Bob, I talked to my friend.
A little bit about my friend so you know who he is and his expertise. His name is Mark Lee of Mark Lee Bluing solutions, which many of you know of and have used. Mark has been in the gun finishing/refinishing business for well over 50 years. Also of course a very well known custom gun metal smith who apprenticed under Herman Waldron and worked for Don Allen, Dakota Arms, before moving on to other fields of endeavor. 
So, if you are serious about stripping the plating and retaining the Sharps in the best possible condition you can then DO NOT USE any process that included electricity. The reason is because you can pit the action before you even knew what happened. You want to research and find someone who uses a totally chemical process. A place to start is WDForbes.com here is Mpls, MN area. They are a chemical house and they may be able to steer you to a plater who employees a chemical strip process. I don't think you can buy the chemicals yourself as cyanide is required.
Mark told me that at the shop he worked at, Ken's Metal Finishing, the process they used, you could hang your parts and just leave them in the solution for ays with no fear of damage. But they also had an electric strip process and because the plating is not even you could pit the underlying steel very easy.
Mark agreed with me to not be concerned tolerance from platting thickness. 
Also if you have questions you can contact Mark yourself thru his website for his bluing solutions. I hope this helps 

I respectfully disagree with your friends assessment LRF. The fact is the results of using 'electropolishing' are quite the opposite. My Wife spent 40 years as a materials engineer and QC inspector for the Aerospace industry where, fact is, the demands are about as demanding as any field. She worked with three specialized plating companies all which used electroplating and electropolishing almost exclusively. There are a few parent metals that can have pitting issues such as cast metals due to porosity and carbon formations otherwise the end result of electropolishing is as this quote below.

" Aerospace prefers electropolishing over acid etching for several key reasons, driven by the demanding performance and safety standards of the industry: 

Superior Surface Finish and Cleanliness

Microfinish Improvement: Electropolishing removes microscopic peaks and defects left behind by manufacturing processes, resulting in a smoother, more uniform surface. Acid etching typically provides a coarser surface finish compared to electropolishing.

Ultracleaning: Electropolishing effectively eliminates surface contaminants, debris, and foreign materials, crucial for achieving ultra-clean components in aerospace applications.

Reduced Friction: The improved smoothness and removal of surface imperfections achieved through electropolishing lead to a significant reduction in friction between moving parts, enhancing component efficiency and lifespan.

Ease of Cleaning: The reduced surface area and smoother finish achieved through electropolishing minimize product adhesion and contamination buildup, making cleaning and maintenance easier. 

Enhanced Corrosion Resistance:
Electropolishing removes the surface layer of metal, including embedded contaminants that can initiate corrosion. This leaves a chromium-rich, passive surface that significantly enhances corrosion resistance. 

Suitability for Complex and Delicate Parts:
Electropolishing is a non-mechanical process, meaning it can be used on delicate or intricate parts without risking distortion or damage. Acid etching might be too aggressive for certain parts.
The process can reach and effectively treat complex geometries and internal surfaces, achieving a uniform finish even in difficult-to-reach areas. 

Improved Fatigue Life: "

Rick

Yep nothing would please me more than to see a nice guy like Bob ruin his Borchardt receiver based on some skimpy unproven advice. Over

Rick

Bob,
All this info sounds like your going to end up with a nickel/copper shell laying in the bottom of your solution tank with no action to be found!😳😂😂

Tom Klinger