I am trying to draw a 1930s Walligraph Spun lampshade. It is a cone, cut at an angle, with a rolled edge. So when it is manufactured it is spun, and then they roll the edge over a piece of wire or something.
I have drawn the shade, but for the life of me can't add the rolled edge, but couldn't figure out how to do it before this point either!
Any help would be much appreciated.