Originally Posted By: barbarian
I always recommend a DMT Diafold sharpener. It's great for a quick and dirty field sharpening, regardless of steel type. Just a splash of water, or spit on it and its ready to eat steel.


This.

There are a couple of sizes and although I don't edc mine, I've had it with me on extended trips and used it touch up everything from my edc knife to an axe. Works great.