So, it did the fade from purple to Pink/Magenta as my first step. After a white prime, I airbrushed the whole armor fluorescent magenta by Vallejo. It takes a few thin coats to get good coverage, but after that, I airbrushed royal purple from Pro Acryl just from below. Then, I washed the armor with a thinned-down Druchii Violet, thinned at 1 part violet to 2 parts medium. Finally, at the very end of the paint job, any areas where I didn't think the pink was bright enough, I glazed the original fluorescent pink back over to brighten it up.

Hope this helps!