Hello Kai, Not forging scale, but a finish that is achieved by dipping the steel into oil and heating it to produce a smooth dark protective coating. The metal has a very smooth finish to it with no forge scale. The pictures do not show the color very well, it is a very deep blueish black. I only cleaned the surface rust off of the metal and there are still quite a few small spots of hard rust in small patches.
Regards,
Robert
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