Soaked em for about an hour, scrubbed em which didn't do much at all so i took the jet wash to em and they've come up gleaming.
Look bang on. Spent 6 hours yesterday cleaning it inside and out, the dark got the better of me in the end but all in all besides using a metal polish and glass cleaner i got the job done.
Looks awesome i'm just waiting for some HT leads to arrive, get them fitted then i can let my new milltek exhaust raw. Mint