There's another caution here
Aside from odd smells perhaps indicating powder that is going bad, there is another caution to be aware of.
Urine decomposes into ammonia. Ammonia (even fumes) weakens brass. I read on another thread where ammunition stored near a cat's litter box wound up being dangerously weakened. (Warning: second hand information.)
I know some metal polishes contain ammonia, but most brass does not have to contain thousands of pounds per square inch pressure.
Take care,
Lost Sheep
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