I was able to remove the varnish with nail varnish remover from my wife!
![Big Grin](images/smilies/biggrin.gif)
And I have removed the surface rust underneath. The blade shows scratches either from the original finish or from an unprofessional cleaning from a former owner.
![shrug](images/smilies/shrug.gif)
Here are some new pictures by daylight. Is someone able to translate the Arabic stamp?