If you ride man made on the ice Coast, your deck can look like this in no time. Next time you wax, try this:
On the outer two inches of your board, right along each edge, use a much harder, cold temp, wax. Then use your regular all temp ( if that is what you are using ) on the rest of the board. Your edges will always take a beating and the harder wax along the edges will prolong the lifespan of your wax job. Don't worry about mixing the waxes. Many of us who wax often mix up our own "special" blends.
I tend to to do this 80% of the time when I wax as I am more often than not riding man made. Remember riding on man made is one very small step away from riding on ice.