Well, I will confirm
that this method does indeed work. I used Meguiar's Scratch X from Target to successfully remove 2 very annoying scratches that were a result of a plastic thread in the BlackBerry case. It took about 5 or 6 applications of the Scratch X with an oakley microfiber sunglasses bag to get the scratch where I couldn't see it anymore. I then used the Radio Shack digital camera screen protectors to custom fit a screen protector to the screen... which is hard as hell to do and I used 3 out of the 4 to get it on there without any super annoying dust or bubbles... at least they are cheap! Also, if you use scratch X and the Radio Shack screen protectors, DON'T use the alcohol cleaning pads... I think they reacted with the Scratch X and made my screen fog up. I had to re-apply the scratch X to clear it back up. I then wiped it off with water and the oakley bag.
The scratch X does not damage the screen in the slightest (as far as I can tell) but I am not an expert so you are doing this at your own risk