I'm working in cleaning up an old knife, and I noticed it has almost a chisel grind. The "back" of the blade has a nice edge, cuts hair, catches nail, etc. while the "front" is only sharp-ish. It's not supposed to be a chisel. I'm not sure if this is preexisting abuse (the blade had obviously been well used and resharpened before I got it) or a mistake on my part. Either way, what's the best way to correct it back to more symmetrical? My instinct is to just give it some extra strokes on the "flat" side, but figured I'd ask.