New Sage reel problem.

Hello just bought a Sage 1201 it's a smaller reel with an offset
gears.. I fished with it twice and really think it is a great solid
little reel. But when I took the spool off I noticed that the main
shaft gear had rust on all the teeth. I fished in a light drizzle with
it other than that kept it as dry as I could given the fact that I'm
standing in water and my line is wet from water etc. etc...the reel
still operates fine. Just wondering if I should be concerned? or if
there is anything that I could apply to prevent/remove further
rusting?
Any Tips appreciated.
Brian