Thank you for the product suggestion. I bought a few of these for now:
http://www.dealextreme.com/details.dx/sku.36157
http://firesteel.com/products/GobSpark-Armageddon-FireSteel-with-Scraper-and-Lanyard.html

I also have a Swedish Firesteel by Light My Fire, which is overpriced compared to its competitors. I don't carry a ferro rod on my key ring. I like to keep my ferro rods attached to a container of tinder, which is too bulky for my key ring. However, I would wear the system around my neck or in a pocket. By the way, I would consider putting a Peanut Lighter on my key ring.

Slight detour, this is about the coolest video I've seen pertaining to ferro rods:
http://www.youtube.com/watch?v=UuD8LrB8SGY&feature=player_embedded

I haven't protected my flint strikers and have not seen corrosion. If I ever felt the need to protect, then I guess I would grease it and treat it like a gun barrel.

Can someone explain to me how shrink tubing prevents corrosion. I'm thinking that would promote corrosion.

Originally Posted By: jzmtl
I have a small fire steel on my keychain for probably a year now and it gets wet all the time from sweat, condensation etc. no sign of corrosion.

same here
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