Normally you can buff out light scratches. Use a good quality polish(long term) or glaze(mainly a cover up, although I hear 3M Imperial hand glaze is rather effective). If you are trying to get swirl marks out, I know Meguires has a Swirl Mark remover you can get your hands on at almost any auto parts store, until you can find better stuff to use. I have also heard that GS27 scratch remover is supposed to work well with both deep and light scratches.