Screw Head Set
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In order to create a screw head you will need the Screw Head stencil set and pro-color paint black and white.
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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.
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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.
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Clean your airbrush and then fill it with pro-color white. Spray a contour edge on one half of the circle.
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For the next stencil element, position the screw's slot on top of the present spraying results. Spray the whole slot with black.
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Here you can see the intermediate results. The screw is almost done.
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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.
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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