They mix well with other colors. But you it is best used through a .35 or bigger. They tend to clog up smaller nozzle fast.
Not really sure what you mean by brilliant / vibrant. for the most part both pearls and metallic just add flare to the paint. which they do nicely , the metallic are finely ground as well as the pearl ,
Neither will dance the way dry pearl or metal flake will when added to automotive paint.