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This is such a great idea for those who have a bunch of nail polishes like me and don`t know how to organize them.
3 Black Foam Boards, a (sharp) box cutter, hot glue gun, popsicle sticks, gold trim and black acrylic paint.
The popsicle sticks are glued on to each row to work as a ledge to prevent the nail polishes form slipping off. It also made gluing the trimming on super easy.