Dill,
Agreed, I use Flitz metal polish and also their lesser known product, Polier.
I've polished out power cord prongs with Flitz and then cleaned with Caig. For unplated speaker posts such as Cardas manufacturers, there's a copper cleaning gel containing Hydrofluoric Acid that works miracles. If the post is unmounted you can drop in the solution for 15 seconds, remove and wash with water. It literally looks flawless and brilliant.
If it's mounted on speaker or amp, apply the gel with Q-Tip and then wrap paper towel around the post and spray with water. I bought one of those spray bottles at Home Depot for the job, usually used to mist house plants.
Agreed, I use Flitz metal polish and also their lesser known product, Polier.
I've polished out power cord prongs with Flitz and then cleaned with Caig. For unplated speaker posts such as Cardas manufacturers, there's a copper cleaning gel containing Hydrofluoric Acid that works miracles. If the post is unmounted you can drop in the solution for 15 seconds, remove and wash with water. It literally looks flawless and brilliant.
If it's mounted on speaker or amp, apply the gel with Q-Tip and then wrap paper towel around the post and spray with water. I bought one of those spray bottles at Home Depot for the job, usually used to mist house plants.