I always carry a couple of those golf pencils with me to write on my range book. Its a rite in the rain book so the pencil works great. Sharpen it on a rock if you have to. I do EDC something i have never heard of from anyone else. I carry a black China marker. It writes on anything and I mean "anything". When its dull, just pull the string and unwind some more point. They are really soft and write on glass, gloss paper, you name it. They are even great for tactical stuff such as room clearing, you put your mark on the door with it and everybody on the team knows its been accounted for. It is even good for marking hasty breach points on walls, just mark the spot for the charge and there is no question as to where the charge needs to be placed. you can let it rip with confidence that there is no communication breakdown (i.e. verbal target description only) on where the charge needs placing. And they write on wet surfaces to.