>>5900397Nothing really wromg, but if you're intomcoin collecting a patina is desirable in coins. By cleaning it, you're removing a small amount of the coin, therefore changing it. It would be like if you clean a figure by sanding it. Sure it's clean, but you've removed some of the paint, some of the details.
Anyway, it's your coin and if you're hapy with it, cool. It's a nice coin.