I would stitch them to the fabric covering the inner ring, or if you have a drill, you could drill a very small hole in the hoop and thread the metallic thread through the hole from the back and pierce the fabric and thread through and the do the opposite on the other side using a knot to anchor the thread on the inside of the hoop.
Or when you are still assembling you could add a hanging loop either in metallic or ribbon to the inside of the hoop, you could attach this one with a ting blob of superglue (I'm with you about keeping glue away from stitching in most circumstances, if you are careful here though I think it would be fine) or you could anchor the hanging loop with a knot at the end, then pull through. Then finish with the backing the way you explained in FoF. Before it would attach to a flat surface it would dangle at an angle (
) but would lie flat against a wall. Hope this helps.
Sewing them to the fabric itself would have to be done before gluing it to the ring, and that would take quite careful planning to make sure they were still in the right position when the fabric is glued on (to get it taut you have to pull it this way and that while the glue is still malleable) so the one that would work best is probably attaching them with superglue to the inside before adding the backing. I'm working on some little trees at the moment, one of those might look nice stretched on a hoop so I could try the hanging loops then, thanks!
but I thought you might like to see them!
)
