I use Sullivan's in the pink can, it's great! I spray very lightly and do it in my basement. It doesn't choke me up and I don't get spray all over the place. I lay out the backing and put the batting over it, then fold it back in sections to spray the batting (not the fabric), and it works great. Then I put the top on and flip one side up, spray the batting, smooth it down, and spray the other side. On bigger quilts I do it in smaller sections at a time, working from the middle out.