Metal and glue do not go together. It will get all yucky. The tips I found at craft stores are not thin enough. I bought Roxanne's Basting Glue with the long thin tip and just use that for when I want a thin line. I use Elmer's for basting my quilt tops. I used a bottle of Elmer's washable School Glue I had for over five years and it worked just fine. It was never opened.