I use June Taylor all of the time, just make sure you lay down newspaper or something to catch the over spray :wink:
I like to pin or tape down the backing first, keep it taut but not stretched. Lay the batting down, and fold it in half. Spray the back, smooth from the center out, fold and repeat. Then I spray the batting and lay the top on, smoothing it out from the center.
I like to put a few pins around the edges, as I tend to manhandle these areas :D:D:D