Hi Tony,
Here is the Laquer Stick product that Brownells' sells :
http://www.brownells.com/aspx/NS/sto...ACQUER-STIK%7e
The "gesichert" on your 1916 P-08 would have factory enamel applied into the letters. This usually ages to a yellowish color and begins to flake off.
You should typically not try to remove this enamel as it is one indication of a gun's original finish condition.