I've taped off the area around an unwanted name and lightly sand until removed. I followed that up with 0000 steel wool and then apply my favorite Minwax Spar Urethane (satin or gloss).
After a few coats, I remove the surrounding tape and spray lightly to blend in.
If you're good, try writing your own name (or whatever) and then spray again. You may want the pen ink to dry for a couple days or so before the final spray.
Others may have better methods and I'd like to see it, but I've done this on a few I've owned and they came out fine.