Here's the thread on how to make the easiest multi stencil cap. This stencil cap is for a 3oz. can of spray paint. Its applications are for art and decoration. The paint technique is useful in many different ways, details, script, sparkles, doting the j & i, high lights, patterns, textures, touch ups, etc. How it's used is up to you. This instrument can be made completely on spec, if you have the tools to carve it out. Choose a plastic lid that isn't too brittle or thick.
Materials and tools
One or two extra caps
8 ounce spray can with cap (krylon shortcut)
Deco pen to mark on the dark plastic or sharpie to mark on light plastic
X-acto or Utility knife
Skinny tip Li hooded grey dot
The technique takes a little practice and some getting use to. Your first stencil caps will help you develop custom lines and dots. Once you've made few functional stencil shapes, redraw them onto another lid. The master cap should work only with the spray tip it's designed for, you may want to write the name of the tip onto the lid. In this case a grey dot will conserve paint, reduce mist and focus the spray hardness. Here are the two original caps, a forward angle double point and a star stamp. Since I know both these shapes work, they'll be transferred to the master cap. The stencil cut away area is always located a little below the atomizer (grey dot in this case) on the spray tip.
Step 1: Cut open the top
First trace a circle on to the top of the cap. Use an opaque paint marker to layout where the cut out will be. The lid from an OZIUM air freshener will suffice as template for the opening. This hole shouldn't be two big otherwise the plastic looses its structure and cracks. The opening needs to be large enough for a finger to go in with out allowing paint mist to exit. Place the cap on your cutting mat and drag the blade around the circle while rotating the cap with the other hand.