Recently I saw a video how to add glitter to soft plastic lures. Mend-It glue for soft plastics is applied and then the lure is rolled on a mound of glitter or sprinkled on the glued area. It dries fast and stays on cast after cast. The video suggest brushing on a layer of the glue for a glossy finish over the glitter. Here one example I tried:
Here's one in the video:
I poured the lure using clear soft plastic and than dabbed it into chartreuse, lime green and orange glitter from a craft store though any color can be used (black, purple, blue). The glitter only sticks to the glued area.