Use the exacto to cut the image of the line out of the tape. Overlap the ends of the existing lines, being careful not to damage the old paint with the knife. Now apply the black ink mix with a small brush in the image area you have created, and remove the tape before the ink dries. The width of the black lines is very important to the overall effect of the finished job. Cartoon art can be freehanded with a good brush, but a frisket should be cut for all regular or geometric shapes.
Matched colors are mixed and applied with a good brush on a well cleaned surface.
Do one color at a time. Paint up to the edge of the keylines, and work from the center of the glass out to the sides. Should you make an error, remove the paint with a dry Q-tip or paper towel, and try again. When dry, opaque areas should be backed up with a layer of silver or black paint. Lit Areas Application of colors to lit areas is the most difficult aspect of backglass restoration.