Looks awesome. With your metal working skills I am sure you could insert an edge if you wanted. Otherwise, clean up the cut, and start sealing that bitch. I believe most use epoxy and then maybe add a poly urethane at the end. Evidently the edge will soak up a ton of epoxy. I am sure you know this, but just in case. Use a flexible epoxy with as low as a temperature rating as you can find.