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the blade is a vintage Birko (Solingen). It has been modified and hand sanded up to 600 grit IIRC. It was then washed with hot water and cleaned down with acetone before bluing and wearing Nitrile...

Its smooth, no noticable bumps where the markings are.

I blued this blade using the recipe mentioned here http://straightrazorpalace.com/workshop/53566-bluing-recipie.html#post595124 The result was not exactly as expected. Dont get me wrong, I like it...