I'm one of the people watching your channel. I must admit that I am impressed with the care that you have with polishing and, as I am a numismatist, I am amazed at how you increased the value of these pieces. Extremely oxidized and marked coins that look like a "flower of the stamp", as the experts say, making the piece look like new and never circulated. Know that you have an admirer. Greetings from Brazil.