After 20 min of sharpening a Type 19 Stanley #4 blade I couldn’t get it square. At first I thought it was my stone, so I spent some time flattening that. But no change. I then tried to reflatten the blade back, thinking that could be causing the wavyness. I then realized the blade itself has a definite wave in it. Is there any way to flatten the blade, or should I abandon this 50+ y/o blade for a Hock or Lie-Neilson?
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