Buffing a helicon

[Three Valves]

That requires paint.

Out of sight, out of mind!!

[opus37]

Anyone have any info about when an old brass horn turns red? Is this what they call red rot?

Is this impossible to polish out?

There were some large reddish areas on the bell on this helicon. They polished out with the simichrome. I looked carefully inside the bell and saw nothing there so this was a surface issue. I don't know if this is red rot or not, but it did come off, so I would say it is worth a try on your horn.