That time has come, and today I put it on the longarm to get it quilted. In addition to the fraying, which necessitated lots of snipping of long, loose thread, it was very wrinkled being 100% cotton. Ironing smoothed it out a little but I am happy to see that the quilting is taking care of the rest!
In addition to the fraying, the colors in the sashing ran and now the background has a faint pink tinge. Nothing I have done so far has removed that color bleed, perhaps after it is quilted and bound I will try another method, but it needed stabilizing before any more laundering.