It’s slow, fiddly work, but will be so worth it.
Here’s the exact how-to, with pictures to make all clear (hopefully…).
Trim the edge of the backing and batting away from the quilt top by about 3/16″. I prefer the minimum necessary, and think a quarter inch is too much, the outer hexies get a floppy edge.
Stitch your hexie facing together in pairs. Offer up a pair to the edge of the front, and hem the facing to the front using tiny stitches. It helps if you pull the facing back a tiny bit to give you a clear space to run your needle between the fabric layers..
Stitch both sides of the pair to the outer edge of the quilt front. Stop and knot off. You can see the stitches if you look very carefully, but they are small and neat, and with this ‘hemming’ process they’re not right on the edge and will resist wear a bit better.
Take your next facing pair. You need to stitch the right hand edge of the right hand hexie to the left hand edge of the one you’ve just finished sewing in. Lay them face to face and stitch inwards towards the centre of the back. Knot off, and flip the other half over. Now you’re ready to sew the next top edge.
Once all the facing hexies are sewn onto the outer edge, you’ll come back to this inner pinned edge and hem that down too. After that, you’re ready to start quilting. Because the batting goes right up to the edge, you can also quilt right to the edge if you wish.
Yes, it is labour intensive, but doesn’t it give a pretty result?