I have done several flannel rag quilts and all had 1 inch seams, snipped then washed and dried. 2 washes usually does pretty good. clean the lint trap on your drier often as it fills up fast. Part of the problem with round shapes is that some of the edges are on the bias and bias does not fray well. Good lookin' quilt! probably will fray a bit more with use. By the way I would not use the weed wacker, liable to shred the whole thing, tooth brush would be better if you feel it needs more help fraying.