Hardened steel pinions

[Sammus]

Another question about these RCM pinions... I bought a couple a while back when I started my brushless phase. I had a 14t unused, and I needed a new motor for my rustler. So I bolted up my 40t revo spur, went and got a ammo 36-50-3300 for the ol rusty ($30!) and pulled out my as yet unused 14t pinion as was greeted with it covered in rust!



Now I don't live near too close to the sea or in a particularly humid environment, and I've never seen a pinion rust up like from just sitting there. Should I be worried?