Now with any new chalkboard surface, you want to 'season' it. If you don't season it first, you'll get 'ghost' lines from your first drawing that usually won't disappear no matter how much you try to erase it. So 'seasoning' it usually prevents this. Just run a piece of chalk lengthwise on it, then erase. Now it's seasoned.
You can also find the tutorial on the mason jars here.
click here for tutorial), it was just a little 'wintery'. I'm done with winter and cold weather. I needed something a little lighter to get rid of the reminiscents of coldness. I'm going to make warmer weather come here if I have too :)