I've heard of some who use it to serge around fabric before washing so that it doesn't fray as much. I know one teacher who does it to all of her quilts once done and waiting for her to get around to quilting it; she knows in an instant that the quilt is ready and not of some stage in between. I have an old serger (around 18yrs old) I haven't gotten it out since I started sewing again to see if it still works; that still on my to do list.