Thanks for the assist, Panzerjager. The system you linked to seems very similar to the PearlEx powders. They have you add the powder to a clear coat so that you have control over the effect. I looked those over at Michaels yesterday and I would be required to buy two full sets of powder to get the red, green, blue, and gold needed, so that's an investment of $60 for a dozen colors, eight of which would never get used. This alternative you've shared is a lot more economical!
I was warned that the base coat is all important because of the nature of this paint. The plan is to use Tamiya white primer, sanded and polished, then coverage with their pearl white and pearl clear. What I am worried about is some pearls need a black undercoat and tinkering with the masks to undercoat such tiny areas seems like a PITA.
And, it's always a pleasure to meet up with fraternal brothers - best wishes to you from Great Falls, MT!