Cleaning of Pewter Spoons

[99*]

Could anyone suggest how I may clean a pewter spoon that I found on a sandbar its black and corroded but I am sure will be great once cleaned up. It may be silver.
99*

 

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[JakePhelps]

does pewter turn the same color as silver? If it is silver try some silver polish or iv heard of a method involving aluminum foil, but i forget how to do it Not sure about pewter, i think its just like lead kinda...