My questions is: How does "professionals", if you can call them that, "clean" coins which comes straight outta the dirt? Yes, we all know to NEVER clean a coin which is in decent condition, but what about one that is covered in dirt? I'm asking because I think electrolysis might do the trick without causing damage to the coin itself. I have tried this on certain cheap coins, and there is an extreme amount of dirt which comes off. It doesn't really leave any trace of cleaning, besides the color becoming different.. maybe to it's original state? Basically, there's a need to clean coins without touching the coins, and without covering them in oil/vinegar etc. I also tried white vinegar btw, and compared to the electrolysis and the vinegar did next to nothing in the span off 6hrs, while 10 min with electrolysis made it perfectly clean.