Not sure about this two step processing you mention. I have never applied paint over top of a cured jig head.
As with many of the paints that I use, I like to start with a bright white coating, then apply the paint that I wish to end up with. For example: heat the jig, dip and swirl in white, back to heat, then dip and swirl in glow yellow, then cure in oven. This will provide the best coloration. A straight dip into say pink, yields one tone of pink, but that same pink over top of white first, yields a different brighter tone. The glow paints really do so much better when dipped into white first, as do the UV enhanced paints. I suspect this is because the white helps to reflect outwards. Some of my paints require two dips into the final color in order to get the tone I desire.
I suspect that you might get some guidance regarding this process you are interested in, but it really will come down to you experimenting and getting your feet wet.