Hello everyone, I am new to the patina process and have just begun to patina my old penny mod clone using the ammonia and salt method. I am going to let it sit in the container for a full 24hrs before letting it dry, with intermittent reapplication of ammonia and salt, as well as rotation. My question involves the clear coat. What do I use? Do I sand, and if so how and when do I do it? I don't want the patina to rub off, and I want it to be as clear, vibrant, and glossy as possible.