I don't know if random tiny circles would fit with your quilting but I have tiny circle stitch on my Bernina that I would put on the broken spots plus scatter a few elsewhere. I believe it is for doing eyelets for strings but I sometimes use it as bar tack quilting on quilts. It stitches a 1/4 inch circle in tiny stitches and this would keep any threads contained and you could put a drop of fray check inside the circle. Just a thought.