What about the scratched surface of the plastic table?
Should pay attention to polishing time should not be too hard, polishing principle is almost a slight grinding, plastic will be thin. You see, those old computers are sold with this kind of thing to show the appearance of the monitor or the host computer, but it doesn't make much difference with the new one after that.
Special polishing agent to buy plastic products, in some art supplies store, cosmetics stores will sell, domestic imports, ten to hundred dollars price range, but clean your desk even buy cheap is certainly no problem.