Screw Head Set
In order to create a screw head you will need the Screw Head stencil set and pro-color paint black and white.
First, prepare your background. In this case, it is a metal looking structure. Pick a screw head from the stencil and position the circular shape in the desired location. Mix a dark shade of grey from black and white and spray evenly all over the circle.
Here you can see the area in a dry state. The opacity of the white will make sure that none of the metal looking background will be shining through.
Clean your airbrush and then fill it with pro-color white. Spray a contour edge on one half of the circle.
For the next stencil element, position the screw's slot on top of the present spraying results. Spray the whole slot with black.
Here you can see the intermediate results. The screw is almost done.
In order to make it appear more realistic, add a shadow edge. For this, use the stencil foil's half circle and spray the area with black as well.
For the last step, add a highlight with opaque white, and scrape off a really slim contour edge using a scalpel. Try the different screw heads and see just how easily and quickly you can create this effect