I am new to quilting and the terms involved but I assume that by selvages, you refer to the little scrap pieces left from trimming fabric? I have a huge collection of it LOL what I dont use in applicae work is use as stuffing in my dog pillow beds and stuffed animals. I am currently getting excited to start stitching my very first quilt. My new brother sewing machine is still in the box and i have yet to learn how to thread bobbins and so forth. I have done hand sewn quilts with my Amish family back in my younger years but never done a machine quilt all from scratch. I have been cutting blocks and pattern sections from fabric for a lng time and keep every little useable size scrap in similar color pattern bags.