Funny you should mention weed whacker! John Flynn (maker of the Flynn frame) actually uses a weed whacker to fluff the edges of his rag quilts. Check out the description here (you need to scroll down the page a little).:
http://www.flynnquilt.com/workshop/FreeLessons/
I also googled it and apparently he demoed it on a Fons & Porter episode. Perhaps you can find it.
Good luck.