I decided to add a bezel to the Mame arcade machine to hide the sides of the TV after a friend of mine suggested I get a piece of plexiglass and paint the back. I purchased a 1/4" piece from Home Depot and cut it (using a jigsaw, you need to be careful about melting). I then temporarily mounted it to get a idea at to how it would look and to determine the sides for the monitor that would stay clear. Using a marker to mark of the sides, I then covered up the area with painters tape. I then used two coats of black spray paint and removed the tape. Mounting included using an extra section of marquee mounting that I had left over from the sign which I place on the bottom.
Everything went in place pretty quick. The only other thing left to do was to mark and remove a small square section of paint for the IR on the TV so I could use the TV remote as the button is no longer accessible.