On Tuesday, August 8, 2017 at 9:14:00 AM UTC-7, notbob wrote:
On 2017-08-08, Daniel m wrote:

[...] find a polish suitable for brass

No such thing!

Many moons ago, when I was still in the USAF fire dept, we hadda
polish a lot of brass, so I KNOW!

The only thing that gets tarnish off of brass is "elbow grease"!

If the objects are removable, the old barrel-of-sawdust with a few blocks o'wood
and a pint of metal polish, slowly turned by a motor, will tumble it clean
and smooth in a lazy day.