My case is minor - and possibly advantageous. I came across a rather nice 2" M&P a year back in a not-at-all secret large chain store. The price surprised me ; I determined it had something to do with the initials that were crudely scratched of the wooden butt stock. I came away with a nice prize - something on my bucket list , in fact , for a very reasonable $469.
A bit of bronze wool , elbow grease and hand rubbed polyurethane/teak oil mix and I was good to go. Happy , too.
Interestingly , the naked eye in natural light sees no remaining evidence , but a clear magnified image shows a trace. And - the trace indicates a different middle initial. Haunted , perhaps? I have quit while I'm ahead.