I took this diy chalkboard paint project from Martha and this chalkboard globe project from Design Sponge and voila... chalkboard globe of my dreams (almost).
A few tips-- I think it really would be easier to do two colors. I suggest using a white paint marker with a flat tip over the chalkboard paint to trace in the continents. I left a few of the ornate details uncovered and they look decoupaged. I talked my roomy into a quicker version with spray chalkboard paint in black and fluorescent pink spray paint for the stand. Also awesome. The only downside of this project is that it is not helping me curb my globe buying habit.