do this to the top sheet edges, I did it on all 3 of my arbor boards. It definitely helps reduce chips which the arbor boards are prone to. I also just use a stone to de-tune the tip and tail edges. I've been in a funk since May, feels like all I'm doing is waiting for winter to come!!! I'm using burton C-60s on mine, a very stiff binding, but I'm on the opposite end of the weight spectrum, so what is super stiff for some is just right for me.
Take a file to the edges of the top sheet. this will in a sense, round off the edges of the sandwich construction (standard on almost all boards) and will eliminate almost all De-lam or chipping issues.
This works wonders and keeps your board lookin new. you would be surprised how much this helps
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