The wool batting I used in one of my quilts with 505 spray stuck like crazy when I tried to separate it and remove it from the sandwich. I was attempting a double batting, one cotton, one wool and found it too hard to handle so decided to take it out. I had to use a wet comb to remove it from the cotton quilt top and it essentially destroyed the batting. I should have sprayed it with water to try to deactivate the spray baste in hind sight, but never thought of that :-(.