Step 4: Apply liquid latex
Liquid latex is malleable stuff, and there are lots of different techniques used to apply it. I found two strokes were useful here. First, to cover the sharp edge, start brushing from the skin to the ear tip. This fills in the gap nicely.
If a second layer is necessary, it can be helpful to brush from the ear tip to the skin to cover the brush strokes. Only my first ears required a second layer. As I improved my technique (and worked on people without ear fuzz), I filled in the gap with one layer.
It's critical to allow the latex to dry between layers and before applying makeup. The latex will be shiny when dry, and turns a translucent pinkish color. Test it with your finger to make sure it's dry.