"Barry Minchey" wrote in message
...
Removed a fire extinguisher bracket and will not install new one in
the same place. Nasty rust stain. Are there good solvents for this or
should I use a polishing compound?

Thanks!

Oxalic acid crystals from a paint store. It's the ingredient that makes
Barkeepers Friend and CLR work and a lot cheaper in its raw form.

Apply and let work for five or ten minutes. Rinse thoroughly.