Ok this is definitely the most involved option to resolve the problem.
Fixing mirror to wood.
Another convenient way to hang a mirror is by using scotch clear mounting tape.
Resilvering is basically removing the protective silver backing of the mirror and reapplying those layers again on the back of the glass.
Place the mirror on top of the plywood and gently press down over the entire surface so that the mirror grips the glue and sticks to the wood underneath.
Place small clamps around the edge of your plywood backed mirror so that the two stick together while drying.
Cut a thin piece of matching wood to fit into the saw cut.
Hold the mirror up to the closet door and draw small dots with chalk to show where you want the top two corners of.
I guarantee that almost any wood you choose will be an improvement over the blackened edges of the mirror.
Hold the wood in place and affix a strip of painter s tape over the wood piece to keep the wood from drifting while the epoxy dries.
Aside from eliminating the need for tools during installation the seamless material does not require punching a hole in your drywall.
Avoid using double sided foam tape that can damage a wood surface when removed.
Test it in the cut and adjust it as necessary.
Use the right glue.
You can hold up scraps of different types of wood around your mirror and get a pretty good idea of the effect the wood will have in relationship to your existing environment.
Sand the mirror frame with a folded piece of 100 grit sandpaper.
With a ripsaw cut a notch into and across the corners of the joint along the edge of the frame.
Attach the tape to the mirror then over the wood piece and back onto the mirror.
The double sided tape can support up to 10 pounds and is ideal for mounting glass tile and artwork.
Allow the epoxy to dry according to the directions on the packaging.
Glue the mirror on to a 1 4 sheet of plywood include width to attach crown molding framing if you desire crown moldings come with beautiful designs and widths next know exactly what the wall side of the bed is made of and how thick the approximate weight of the mirror and be sure to check the integrity of the murphy beds hardware then web search mirror hanging hardware appropriate for what material the walls of.