Highly reflective objects are rare in nature. Metallic glitter makeup is striking because it produces an effect outside the norm. In nature, most surfaces, including human skin, are irregular, thus they reflect light in a non-directional way. The human eye is smooth plus moist; thus tiny brilliant refection, coming from the eyes is commonplace. These “catchlights” makes the eyes come alive. The use of metallic glitter as an eye enhancement maximizes this illusion.
Photographically metallic glitter adds to the challenge of making elegant images. The brilliant, pin-point reflections they create overtax both digital imaging and film. Often, instead of imaging as a catchlights, what happens is, they image as enlarged white specks, too large and void of detail. Sometimes they image black, void of detail.
This is nothing new, Max Factor and George Westmore,, to name only two famous movie makeup artist, faced and solved similar problems obtained fame fabricating stage makeup. They created successful markup companies as a spinoff. The solution is a special metallic glitter for this application. Consider using a dulling sprayI have heard that a dulling spray was concocted using talcum powder mixed with water and sprayed on using a perfume atomizer. You might think of pretreating the glitter with matte clear spray paint or maybe hairspray.