I pin-baste my quilts. There are a few things about the home-made basting spray that give cause for concern. First, the flour -- this almost certainly will leave a powdery (flour) residue in the works of my vintage machines, which I would not want. Plus, the recipe calls for "salt". Salt will almost certainly contribute to rust in my vintage machine(s). Finally, the video I saw shows the quilt basted with this home-made spray is so stiff, it would be impossible to fold or roll so it can be quilted on my vintage machine(s). These are issues I would be concerned about, and my suppositions may prove wrong. I would, however, want these issues resolved before I would even consider using such a basting spray. My main issue with sandwiching a quilt is the room to get the quilt sandwiched since my quilts have been rather large (a little larger than king-sized). I have back issues (including 4 spinal surgeries) which make working on the floor impossible, and my table, though large, is not large enough. I realize, of course, that these are my problems, but others may also have the same problems.