I have done machine embroidery quilting, using the quilt designs, and spraying the layers helps hold it together when you are setting the embroidery. Otherwise you may have to reshift several times. I have done this when doing larger projects to allow my layers to stay in one place. I have used my Bernina 165 to embroidery a lap size quilt and used the spray technique to get a good end result. Don't want any tucks. That is what I use it for.