A lot of new methods of piecing are calling for the painting on of spray starch as a sort of glue before stitching. A lot of American videos that I have seen demonstrate the use of freezer paper and then the starch is sprayed into a container, (or lid) so that it can be painted onto the paper, and the material is then temporarily stuck to it. I think that is about the only time I would bother to use the starch (at least for now) as I don't wash my fabric and it has enough sizing in it to keep it OK.