I often do scalloped bindings. Make sure you use bias binding and not straight of grain. the more gentle the scallops the easier it is to have nice dips in the scallops. Draw your scallops on your quilt, use this line to put the edge of your binding against, sew your binding on and then cut the scallops away from the quilt. DON'T cut your scalloped edge before you put your binding on. You'll end up with a stretchy edge that is difficult to control.