A friend of mine got me an engraved zippo for Christmas but the engraving is very hard to see as it's on a plain silver/chrome zippo. Any way I can make the engraving pop a bit more. Ideally with black lines. No idea if this can be done or if its just a case of a sharpie and some patience.
It'll sort of happen naturally, if you keep it polished. Dirt will build up in the lines over time and then contrast with the shiny chrome. Felt pen, on the other hand, will make it look gooseberry fool.