I just finished a quilt top my aunt made. It was a six pointed star. The edges were a series of squared off edges. I actually tried to make a binding for it. I made a bias binding.
I read up on EVERYthing I could find on uneven edging. All I found was for scalloped edging. I followed the instructions for sewing it on the back and it worked just fine.
Once I went to hand sew it on the back, there was no way I could get it sewed on without tucking the binding.
I looked at my aunt's Grandmother's Garden and found she didn't do binding. She just turn the edging of binding and top under (probably 1/4" or more. Then she must have slip stitched it closed. She did very fine handwork and I can't see the stitches. I'll take a picture tomorrow of both my binding and her method.