WW2 War medal how do i clean it??

[aa battery]

i found a medal but its covered with who knows what. Not sure if its bronze or brass but i can make out some words. Freedom of fear and want, plus freedom of speech and religion 1941 to 1945 .

 

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[aa battery]

Interesting...

You have a "victory medal...

http://www.gruntsmilitary.com/ww2v.shtml

Do you have anything for electrolysis?

i aint got that but thanks for tellin me what it is.