Hopefully I can provide some insight and answer the questions you have. The molten puddles you see are most likely part of the staining. In fact, based on the coin's condition, it's also likely that it's general muck and gunk that has accumulated from being out in the environment. Personally, I'd avoid touching it. The line you see through the O is an indent within the staining. Oftentimes when you have multiple layers of staining, indents or marks occur, but are then covered by another layer of muck, making it look like it's on the surface of the coin when it isn't. The line that runs through the scroll is what you would call a die scratch. They are common and don't have a premium. Either that, or it's simply another mark within the staining.
However if there was minor die clashing on the coin, (which I do not see based on these photos), the coin is so covered that it still would not carry a premium, and in my opinion, wouldn't fully be worth keeping.
I hope I was able to provide some useful information.