1. Quilt your quilt as desired. Square the edges.
2. Cut 4 strips, 2 1/2 inches wide, one for each side of the quilt, a bit longer than the length of each side of the quilt.
3. Press under 1/4 inch on the long side of each strip. If you want, also cut a strip 1/2 inch wide X the length of each strip out of Wonder Under, and fuse it ( keeping the paper on) atop each folded side on each strip.
4. Choose 2 sides to be the "corner" sides ( opposite each other) and pin strips to quilt matching raw edges. Sew the short edge, starting at the crease , turn the corner with a single stitch on the diagonal, then sew the long edge, gently pulling the strip as you sew to take in some of the stretch of the fabric. If you cut these two strips beforehand, make them 1/4 inch shorter than the width of the quilt and ease it while you sew so they match. Sew to 1/4 inch before the corner, turn at the corner and continue sewing down the short length, stopping just at the fold crease. Trim the facing strip even with the quilt top.
6. Now lay long edges with raw edges aligned, overlapping the first strip only as far as to cover the turned under edge of the first strip.