Use a pencil and trace your design again , you should be tracing on the original design side of the paper now . When you have completed tracing the design pull your paper and there on the painting surface should be your white design out line . I apply an under painting to bring my clown to life . I use the white as if its the only color I will be doing the clown in . Where there will be dark areas or shadow areas in the face and hair you want to use less white base .
Lets take the hair as an example and the color yellow .
As you apply the yellow in the areas where you used less white the yellow will be a darker shade of yellow than where you used more base white . There you have it high lighted , and shadow areas that easy . There is no sense in my going into the colors I used unless you use Sherwin Williams . Just avoid using black in your designs as much as possible and have fun . On the inside of the ripped metal I use solvent proof free hand shields to form the inside edge of the metal .