lol ya, realised that too. maybe use lighten and darken for a rich, scratched effect. look at jghall1's tut for more info, cos it really helped me there!
my tip is to start small and not to use smudge tool so that once you get a hang of it, try bigger squares. lookj at my textures for inspiration. :)
lol u saying maybe failed like me? i actually quite like em, so +1