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Yeah see here for what happens if you sand too much:
http://straightrazorpalace.com/custom-builts-restorations/18600-finished-last.html

That part just fell off. :)

Keep in mind that this is a hollow ground by the looks of it.
This means it is actuall possible to sand through the blade, if there is pitting on both sides (if the pits are deeper than half the...