I have a couple of kitchen knives (Miyabi 7000MC) that have engraved (debossed) text, logo, etc near the spine. The colors have worn over years of use. I have been doing some rebeveling, repolishing, etc... sort of mini-restoration. They've been treated well, but after 15 years things wear a bit. I'd like to restore the coloration to the engraved elements. For other tools I've used acrylic paint markers and nail polish with good results. For example, I used those on a socket set to make the engraved sizes easier to read. I don't think that will be effective on a knife that sees regular kitchen use, though, as it will wear very quickly with washing and may leave residue on food. Is there a recommended durable, food-safe way to do this? Thank you.