I too had to make capes once for volleyball w/satin, shiny and glitter fabrics...I too ran into the same problem...I used wonder under...and, left it as is....they are still together:)If you just don't feel good about leaving the edge as is...and sewing is not an option...try just a thin bit of matching acylic paint in a tube on the very edge...:)Wonder Under is my choice of fusing! I just used some pellon....it was a baaaad idea! I don't know if it was old or what...but, once pattern was ironed on to the back of of fabric....I could not seperate the paper off the backing to apply elsewhere....it was terrible!! just an fyi...Skeat (Or could try tear away stabilizer...which might be a bit much w/that fabric)