I think the spray starch would definitely work for ONE BLOCK but the weight of a whole quilt???? I am not for sure that would work. Besides when I free motion, it might take me several days to quilt the whole thing and if it only holds for 6 hours or so, that wouldn't work for me. I think the difference between the starch and basting spray, is that the basting spray stays tacky and the spray starch does not have any tackiness to it.