Virginia, Some six months ago Bill Eisenberg excitingly posted a sure fire
easy method to deal with fire scale.
In desperation he ferreted under the kitchen sink and among Rose’s cleaning
supplies found Kopper Clean. It is the liquid form, not the powder. He
applied it to the silver, and no more fire scale. The product was bought
locally at a Fedco Store, now in liquidation. I will see Bill on Tuesday
and ask him for the label if you cannot locate it in your area.