What's the purpose of painting in the serial/arsenal marks?
Did the Germans paint the numbering/stamps white usually or is that usually done after the fact by collectors? I know in the AK world Communist countries never painted in the serial/arsenal markings and the collectors would do so after so I was wondering if that was the same case in the K98 world. What's the purpose of painting in the serial/arsenal marks?
No, not done by the German's. Strictly to enhance the markings by collectors.
It used to be more popular, but seems to have faded out lately.
..that white stuff can be used to mask fakery. It is almost impossible to tell a fake engraved number from an original stamped number when numbers are filled in with white stuff..