You could paint white blocks to letter onto with a different color
I would thin the paint down and make a wash and kind of hit the corners of the letters making a sort of shadowing effect in color. Does that makes sense?Chipping away. Filled in the letters and outlined. May need another coat of white. Still debating if I should fill in with color.
So, water down the color with a drop or two to thin it out and lightly touch the edges? I think I understand now. Thanks!