Your second color will have to be added by dipping the jig in a second color that isn't in a bed. I use the lid off the container to pour some paint in. You also can use a brush and tap the color onto the jig, this is the way most add the second color. Take a small arts & craft brush (using paint in a lid) and load the brush with paint. While the jig-head is still hot hold the jig closely over the lid of paint while holding the brush over the head, use your index finger to tap the brush making a powder of paint fall onto the head. Takes a little working with everything to get this right. The head may not look right when you do this but once the head is cured the two paints will blend together.
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Ascend 133X 13' - MotorGuide Xi3 & Mercury 4