Well kind of!
Into the land of soft treatments that is.
Since I also run a workroom and have my brain on window treatments a good deal of the time
I was so excited to test this application out on a cornice board.
To do this you will need a hard cornice board that needs some love, or build a new one.
I had one in a tan linen, so I had a custom "Fiona" O'verlay panel made to the same size as the front and simply attached it with small wire brad nails. I then used white paint to hide the nail heads.
You can also do this directly to a painted wood cornice and attach with glue.