I was rather amused the other day at an online argument about whether of not to clean a coin. Apparently someone went to town cleaning a really nice silver find and in the process might have lessened its value. The cleaner or polisher responded that they never sell their finds so they could do whatever they wanted with it. The nagging coiney would have nothing of it and the end result was a back and forth with friends and fans of each chiming in with their advice and best practices.
Much like the “do coins sink deeper” topic this is another without a definitive or compelling answer. Just bring it up and you will hear recommendations, recipes, systems and always someone will swear they have the “best” way, the “professionally accepted” way to do it. Interesting too that almost all coin collecting websites have disclaimers in bold print when referencing the topic.