[devolve]

.

I put a light clear coating of my “special” mixture on pewter to prevent oxidation

Usually a good beer followed by rinsing well works.....

[potlatch]

I have some silver that had a coating put on it. Then it wore off in places and was the devil to clean.

Also, I found that if you run pewter through the dishwasher it comes out bright and shiny!! Must be something in the dishwashing soap.