Hello, my program is moving our home course away from our high school to a park near our school. I was looking for some alternatives to properly mark our new course. We have historically used field marking spray paint on our high school's campus, but the officials in the park do not like the idea of spray pain in the park-which I completely understand. I am trying to brainstorm a less 'permanent' marking solution-one that can be easily cleaned or washed away when we are not racing. Has anyone used chalk before? Is that a viable solution? Please offer any and all ideas you may have