Look for some Fitz or Maas metal polish.
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Examining the "feinster silberstahl" Solingen, I noticed this. My razor used to be part of a 7 day razor set!
Beware: Straight Razor Porn in attachment!
"silver steel" was more or less a marketing gimmick, much like "Damascus steel" and "magnetic steel" was...
Just a way to say "hey, my razor is better than that guys!"
maybe they added .000001% gross weight of silver into their steel mix...and that made it so they could advertise it that way.... :)
Both razors look very sound. Just clean up a bit and hone.
chris