A friend in Three Rivers has a rock in her front yard (well duh, most people in Three Rivers have rocks in their front yards) and for a few years, she has wanted some words painted on the rock. She mentioned it to me and I said, “I can do that!”
After she explained her idea, I spent time messing around with typestyles, looking for something I could imitate. After experimenting awhile, I realized the only choice was Papyrus, the type that graphic designers love to hate. I love it. What do you expect from an unsophisticated, marginally educated, DBO* from Tulare County?? It was the best choice because it has ragged looking edges, and I was painting on a ragged rough surface.

I forgot to bring my chalk to mark the borders, but was able to scratch in the lines with a rock, then put a first layer down to see if I could control the paint and a brush. 
Yeppers. I can do this. A new brush helped.
Layer layer layer. Watch out for drips.
Remember to step back and see if it is readable. 
My friend wanted it subtle, and liked the light color. I asked if I could add shadows, she was good with that, and we both liked the results.
Voila! Sanctioned graffiti (or sanctified graffiti?) My friend said, “Tell your people that I am thrilled, filled with happiness and joy over this!” I said, “We are ending this year proclaiming the truth.” She said, “Amen”, and we were both quite satisfied.
*Ditch-bank-Okie is supposed to be a pejorative term, but I view it as a compliment.