To create a screen protector I ordered this mousepad from Amazon:
I then used a rotary cutter (wife is a quilter and she is not aware I did this) with the laptop keyboard section on top of the mouse pad (had the screen open to 90 degrees and hung over the edge of the cutting table) to get it close to the correct size and then did minor trimming to get the final fit. I elected to cover the entire lower section of the 16 and not just the keyboard.
You can actually make 2 FW16 covers with this pad. At $9 the pad is relatively cheap and the only thing I would use. I got the idea from using a very thin mouse pad (I somehow acquired) to provide the same protection on my FW13 for the last 3 years. Unlike cloth or other material it won’t wad up, is not easily creased, and you always have a mouse pad if you need one.
It is very thin with satin material on one side and soft rubber on the other. It fits perfectly between the screen and keyboard and puts zero stress on the closed screen/hinges.