On Jan 22, 10:15*am, notbob > wrote:
> On 2011-01-22, J. Clarke > wrote:
>
> > You'll also see it on motorcycle exhausts.
>
> > There's some stuff called "Blue Job" that you can get at some motorcycle
> > shops that is supposed to take it off without scratching but it still
> > takes some scrubbing. *
>
> Yes, but m/c exhausts are chromed, not polished. *
>

True, but it's the same phenomenon, even though the metals are
different.

-J