Double skinned and why.

some years back i was at a bike night on the triumph as there were two bike nights close i decided its time to go.there were two guys at the bike when i got there they wanted to talk .at the end one said great bike shame about the exhaust,it would look a lot better with a nice chrome one i said that would be a waste of money the guy said why i replied it would be like the one on by the end of the month.i have not had a exhaust that not tarnished bar one the buell is still the same as i got it in 2005 but its made out of titanium.even the double skinned superdream blues over time.enny bike the exhaust is the first item that the finnish deteriorate what they do and put up with is no help