i would not use fray check unless there is a danger of fraying into a seam. all you need to do is take a small pair of shears and 'clean it up' a bit, you just need to clip the worst of it. why is is so frayed? if it is just normal loose threads from handling it wont take much to clean it up and remember for future projects. i do this as i go along...when i sew blocks together i have a little pair of scissors on my ironing board, when i press my block i clip off any loose threads at the same time, when i sew rows together, again i clip loose threads at the ironing board, when the top is together there is very little mess to deal with, it is easier to take care of it as you go along than to deal with all of it at the end. i had to learn the hard way too :thumbup: