I know that this is about as basic as it gets , but I have been trying out a few different markers for my map notes. I tried a felt tip marker, a pen, and a marker than claims to be permanent (but not a Sharpie). All would run as soon as I put any water on the test area. Is there a marker that works, and maybe one that is available with different size points (fine, medium, etc.)? If you have some kind of special system for colors and such, let me know.