G'day Buddy and wellcome tothe Forum
sorry i carn't help you with the gunk on your headers someone else will be able to help you out with that once the lazy buggers get outta bed lol
as for the Autosol do not repeat do not use it on our Triunph Chrome its to harsh a polish use it on alloy sure it works a treat,on the Chrome no it'll scratch the crap outta it
i found that out the hard way
Benny

04 yellow&black Speedmaster+the Money Pit{xj jeep}