I spray basted a baby quilt on the back of my garage door in the summer. I used masking tape every 4 inches to tape the backing up (a pin through each masking tape on the the fabric edge.) I sprayed the back and smoothed on the batt. I then sprayed the batt again and smoothed out the front. I was afraid that the weight of the sandwich would pull down the quilt from the tape but it held. If I was to do a larger quilt, I would use some other method to attach the back up because I don't think tape would be strong enough. I did like doing it on the back of the garage door because I didn't have to worry about fumes or overspray.