Gonna find some nastiness underneath the solder/epoxy/whatever. It's only 0.2g heavy, and there's a lot more than 0.2g of coating.
Someone got it hot enough to make the solder stick, so yes you can take it off. you may not get 100% of it off, but it would look better than it does if done properly.
"If it is solder, could you heat it and cook it off?" This coin is not worth wasting even 10 seconds on; throw it in your bullion box and move on...