Cruise.
The engraving is into the steel, not very deep, less than a millimeter.
An idea I had was to get some enamel paint, both blue and red, and when you get the guide, paint it into the engraving.
As the paint is going off, gently rub the excess off, and you have yourself a blue and red horse like in the Stag logo.
You could also get some clear laquer and paint the engraved section with the laquer to seal up the engraving.
Then you don't have to worry about any dirt.
Cheers
Bass Out