its pretty sweet, the exhaust does look great you really made it look, uh... well used (my words just failed me, thank god college made me so articulate). If you understand me, that you can really picture those pipes running hot for long periods and then the metal changes color slightly.
I think someone mentioned it earlier, and I have to agree, that those the metallics look great (as in contrast and highlighting) but they dont seem very battle scarred or dinged up. Im really not sure how youd achieve that look but Im sure someone (if not yourself) on this site would know.