I agree with quiltsRfun. I'd go with an iron on stabilizer. A soft one that is sewable. If you try to sew 2 pieces of fabric together, you could get shifting and more wrinkling than you might would want. Of course, you could glue them together and the Elmer's school glue would disappear when you wash the quilt. So, either way. Your choice. That's what is sew much fun about quilting. You can reinvent the wheel any time you want.