i go out to the deck and fold my top or back in half (wrong side out) and spread it out on the rail and give it a light spraying.
i then spread my batting on the floor and make sure it smooth. then place the pieced top on it and spread it out smooth - i have to lift and shift a few times. then i flip it and spread the backing on it. smooth it out. this last time i did not pin but usually i will put a few around the edges just for piece of mind. then i flip it again to make sure the top is 