A good comparison video by Digiprost
It looks better when you're in the right distance away from the display. His camera is too far from the displays. From my POV, it's less noticeable.
It doesn't need to be clear plastic. I had some excess PVC plastic (less than 2mm thick) but, anything rigid enough, that you can cut down to the width you need should work (mine are about 1" wide). Then I cut the mylar (Chrome) a little wider (1/8 - 1/4") so it would naturally curve at the leading edge (conceals the plastic-edge from view).
I've attached a basic illustration that may help.Dou you have some pictures to explain your text?