Fons & Porter : Water Soluble Fabric Glue Marker
Narrow glue marker allows for a more precise application.
Blue air-soluble ink shows where glue has been applied.
Color fades as glue dries. Any remaining glue washes out.
Soak lace or similar product to completely remove glue if necessary.
NOTE - Always test glue on a swatch of fabric to be sure that it can be removed satisfactorily before using on your project.