Corrosion inhibitor chips-

http://www.midwayusa.com/viewproduct/?productnumber=154282

A couple of these in your Bic baggie should reduce the corrosion of the wheel and flint. Should work for flints too. Or anything steel that you want to minimize corrosion during storage.

I've seen these in the boxes that reloading dies come in. No picture on the website but these are little one-inch squares of what looks like white cardboard impregnated with something that reduces corrosion in air.