Ok, so I figured I would follow up with my own topic, after I decided to use my PS3 as the guinea pig. I used Meguire's ScratchX to buff out the various scratches, and then applied a layer of Meguire's NXT 2.0 Tech Wax, for good measure. I decided to just stick to hand polishing, as the Playstation 3 shell is just plastic, and an orbital seemed like overkill.
The results were pretty impressive! Just some light hand polishing with the ScratchX removed virtually all of the scratches and mars that were on the surface of the PS3. The unit actually looked much better with just the polishing alone. The NXT wax wasn't even really necessary, but I figured since I had it around anyways, I'd put on a light layer, if for nothing else but to make dusting easier. The added shine was just a bonus.
Anyways, here are the pictures. They alternate from "Before" to "After". (Sorry about the quality. They came from a cell phone.)