You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
So I don't know how many more of you out there really worry about edge coloring, but it's something I feel very strongly about. A model with well colored edges just looks better overall to me. I've had a large collection of Prismacolor markers since high school that I use for a lot of the colored edges, but with lots of scifi models you need a lot of gray, as it is the go-to color for any kind of space ship, it seems. I had some gray Prismacolors, but they've run out, and are pretty expensive to replace. I recently stumbled on some great calligraphy pens on Amazon though, that are pretty cheap, and come in 6 different gray shades (both warm and cool grays too).