Threw some primer on the tank but then decided to have a little more fun with it. Sanded off the primer along the top edge and taped it off with some Gorilla tape (kinda like duct tape), double thick to act as a form. What I'm trying to do is create the effect of the top overlapping the sides. Then I made some "rivets" by dimpling modeling clay and filling the holes with epoxy. I'll epoxy them in place and then paint/antique the tank in copper. We'll see if this works.
Hopefully I'm not posting too many pictures. I tend to record everything.