I've made a large framed blackboard a bit like this www.thechalkboard.co/rustic-framed-magnetic-board
Now I want to fix it to the wall so it lies flush.
The problem is I don't want the fixing to show if possible!
So I could screw though the frame into rawl plugs but then you will be able to see the screw heads. I could use mirror plates but then you'll see those at the side. I think hanging it from a picture wire will make it too wobbly to write on (and it's quite big/heavy). I think it's too heavy for glue - and I don't particularly want to trash the wall (obviously happy to drill holes in it).
How would you fix such a thing?
Thanks