Place a 2x4 over the concrete. Locate the straightest lumber 2x4 you could find and put it throughout the obstacles Keeping the concrete set up, or "forms". The 2x4 should lengthen no less than a foot earlier the forms in each path. This object is called a screed board. http://concreteflatwork03468.blogpostie.com/17441862/a-review-of-restore-pool-deck-paint