Did this with all of my keys, need to do it again as the glitter is wearing off... I need to set it better next time.
step 1 was to apply good ole Elmers Glue to the key. Step 2 Shake glitter onto key. Let dry for a hour. Repeat steps 1 &2 for the back side of the key One might ask, how do you keep the glitter from coming off the key? SEAL it with nail polish top coat sealer!