Looks better, but your white scratching on the edges is too strong, too uniform, and too noisy/chalky/sharp. I'd also overlay some multicolored metal patina on your metal to give it some more visual interest and texture (without overdoing it or making it noisy)
Pretty much done again, cheers for the idea of the metal patinas kitteh it actually gave some nice variation, i had some light / dark grunge layers but they weren't doing it as well. I actually managed to grab the scratches brush racer used and man it makes them so much easier to knock out :D