Alright, I am looking at a friend's board who appears to have ridden it for probably 3 years without ever touching his edges. How he has survived is beyond me, but that's another story. The side edge doesn't look like it'll be bad, but his base edge...whoooo boy. Some pretty good nicks and burrs in there, but nothing that looks like it would require serious repair.
So, should I just attack the thing with a ceramic stone to try and get the edges polished up and the nicks removed before hitting it with the base and side file guides? I'm pretty sure if I just try and sharpen it up without doing something to his base edge it will remain pretty gnarly.