Creating a random display of curved lines segments is a fabulous method for hiding concrete cracks that have emerged through a Kool Deck or lace covered patio.  To any onlooker, the final product shows a pattern of interesting “jig-saw” shapes that overshadows the thin hairline cracks.

In the below photo, Kool Deck “stones” were created with a shallow grinder score, and cracks were hidden in the faux joints between them.