This is an experimental project to see if adding a border ring to a domed silver disc improves the overall result of the finished enamel. When I created the set of enamel doorknobs I didn't add a border ring, so the cloisonné wires had to be ground back to be quite thin near the perimeter of the piece where the enamel became thinner, or in some cases, left with a slightly non-smooth surface. This doorknob (above) shows the problem, albeit minor, but to the perfectionist something to improve!