I haven't used it on the long arm but I used to for quilting on my regular machine. Since there aren't that many scallops you could also just use washable glue stick. That way you won't have to worry about overspray. Just use a clipboard (or hardcover book ) and a sheet of paper to protect it. Lay it down on the quilttop next to the scallop, flip over the scallop and glue stick the edge, flip it back over and voila! You don't have to get the whole edge covered either, just enough to keep it down, kind of glue basted. I'm an expert in glue stick (I'm also the Queen of reverse sewing [ripping out]).