H. Miller......Take some black paint, like Rustoleum in a can, use a small artist brush and paint in the letters. Don't worry too much about slopping outside the lines. When you're done, use a small amount of paint thinner on a rag or maybe even a small sponge and wipe down the handle, cleaning off the excess and leaving the paint in the lettering.
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor