I just started using the 505 spray and love it. I go out on my deck spread a sheet. It has worked wonderfully for me. I lay the batting down first then put the backing down on top smooth out all wrinkles and then peel back one end at a time to center spray and then keep smoothing. Wait a few minutes turn it over and lay the top on and do the ame again for the top. What a wonderful product worth every penny.