to me its pretty futile, marker touch up paint nail polish you name it, you cant get it to look remotely as good as it was before it chipped, and thats the key word, chip, the paint chips off specialized gloss finishes and it looks really ugly,
you guys will probably think im nuts but i got myself some sand paper and actually sand the chips in the paint until its flat smooth to run your finger over, to me it looks a lot better than having divots and holes in your finish, ok the bare aluminium is exposed but it looks hardcore, i got the idea from looking at a demo that was painted to look like it had paint spots missing!!!