I think I just realized why I accept zapping! I am a long term vintage car enthusiast, and though there is growing interest in original condition cars, I have never seen any problem with taking a rusty 57 Chevy, sanding off ALL of that red brown patina and sending it off for a respray.
(By the way, no silver polish ever gets near my
Morgan dollars!)
And since I have an interest in history, why should I have a problem seeing a coin with no patina -- exactly the way that soldier in Viminacium saw it in his hand?