Coloring in the lines

These photos show the stages of my wrinkle-painting technique. The top-left photo shows how I fill in every wrinkle line with dark raw umber paint. I try to paint within the lines, but invariably I paint the lines too thick. After the first stage dries, I thin the lines by painting around them with flesh-tone (lower-left photo). Then I use a stipple brush with a mocha-tint to lighten the dark lines and darken the surrounding areas. This technique creates nice shadows. Finally, I paint thin areas between the lines with more flesh color to "raise" the areas between the lines and "deepen" the lined areas. When it's finished, it should look like stage make-up.