beyblade rust

do beyblades rust/corrode? if they do how can I prevent it without damaging my bey?
They don't rust, they just turn grey, they're die cast metal.
Also, use the Ask a Question, Get an Answer! Thread next time
This should have gone in "Ask a question, get an answer", but I'll answer it here-

While beyblades do corrode, it does not significantly affect performance; they just turn a boring, dull shade of grey. The only way to prevent corrosion is to paint your beyblade, or apply some kind of clear seal, though you can't do anything that will affect the weight of the bey.

EDIT: D'oh! Beaten!