I'm not a pro, and I don't have a power hammer, but I've made bowl from slug of solid copper bar (but mine was square). Lots of annealing!!!!!!! You could also chisel and twist it into cool designes as a stand for something else. just remember anneal more often than you think you have to!!!!! keep the bar hanging around where you can see it and I bet you get an "aha" and next thing you know you'll be posting pictures
