Lots of different things to use. I usually sand to 1000 and then polish with the micro fiber cloths using any good acrylic scratch remover found in the auto parts department of WalMart or an auto parts store. They all work about the same.
The deal with the tac cloth or shower curtain is they are pretty big, and you get more bang for the buck. I use it just like I used to use the paper towels. Works like a charm. Novus plastic polish works well too. It comes in two grades, fine and course. A bit more expensive than the other polishes, and the others seem to work just as well so I don't use it much any more. I think you get a better finish with the micro fiber.
Al @ THO