A sign maker told me there is edging for coroplast. At hardware stores they have aluminum sheeting material, foam core, and other stuff similar to coroplast, and for this they have edging. This fits right onto the coroplast. Coroplast can be very sharp at the edges, and wire fencing the same. Something to think about if you want a finished look, or somethind safer around kids. Of course you can always use sand paper.