This is a project pretty much solely on testing of the pearl powder effect.
The idea I got is from a Hyaku Shiki I saw featured in Hobby Japan. Really love the color - it is basically white n blue. The blue part, the modeler coated it with purple reflective pearl powder. As a result, where there isn't any hi light, the color looks blue, while wherever there is, it turns to purple.
I used the pearl powder from Wave, which I realized, while its finest creates a smooth surface, is a little too fine to create a drastic effect. Adding more will cause more decoloration. It's a challenge to strike a balance.
In the end, I used a much stronger n darker tone of blue, let the whitish pearl to make the final appearance lighter.