Jerry, I bought some milled cotton fiber a couple years ago from fiberglass coatings in Fl , it was grey colored and lumpy and not very uniform at all really pretty crappy stuff to mix. I bought a couple more pounds of it this spring and this stuff was bleach white very uniform and dry feeling. Very nice stuff to mix in, kind of like silica. Don't know why the difference in quality but it is great to work with. I could never do the size area your doing all at one time, I work too slow and pot life "cooks" my goose. nice work!