Get a large diameter piece of steel or iron tube for your mandrel. Using the soft faced hammer, start to bend the very edge of the bracelet. Use sharp overlapping strikes along the width of the copper to start the copper curving. It will look much smoother when you are completed. Once the copper has a bit of curve, take the metal in hand and manually put a sharper curve in the metal simply by carefully bending it. This is a great deal quicker and much easier. From there put the curved copper (now very MUCH like a cuff) on the mandrel and hammer smooth and symmetrical any parts of the bracelet that look out of place until it all looks right. Or at least, right enough to you.