Lightly place painters tape on the front of the soap box in a diagonal pattern. Keep in mind that the area where the tape lays will not have glitter on it. Try your best to space them tape out evenly. Don’t press the tape on the box too firmly; because the box is cardboard the tape can peel away the box.
Brush glue on the areas of the box uncovered by tape. Just a light coating of glue will work! We used Tacky Glue, but you could also use Elemer’s Glue or Modge Podge.
While the glue is still wet, sprinkle the box with glitter making sure all the areas with glue are covered. Use your fingers to lightly press and spread the glitter on to the box.
Shake off the excess glitter, and place back into the container.
Allow for glue to dry for several minutes. Then gently and slowly, peel away the tape. Allow the glue to thoroughly dry. We found that the glitter does continue to fall off the box a little. To help prevent this, you can spray the front of the box lightly with aerosol hairspray. Place soap in the box and enjoy!
Recipe by Soap Queen at https://www.soapqueen.com/bath-and-body-tutorials/home-crafts/how-to-up-level-your-soap-boxes-with-glitter/