We get sent lots of black and white images to engrave and a common question is "can you colour in the black areas?". In short yes. We can apply a fine cross hatch 0.8mm apart which in-fills the darker areas and re-creates the colour fill. It works on text as well and can really make it 'pop'.
The next question is "what does it look like?". Here is a two pint old London style tankard (TK103) I engraved this morning with the scouts logo on it that has been filled with a hatch. As you can see it looks amazing!