I have to confess that I've never faced this problem, but, in general, I find that automotive cleaner-wax usually handles all kinds of strange dirt and stains. It's also pretty safe, so that's what I'd try first.
Steve Maas Long Beach, CA
David Feldman wrote:
> I'm working on a customer's 45 year old Cinelli and it
> has rust-colored grime in stripes on top of the paint
> where the brake cable was clipped to the top tube.
> Has anyone removed this kind of superficial rusty dirt
> without harming the paint underneath?
> What did you use?
> Thanks
> David Feldman
> Vancouver, WA