At what point is collecting nail polish is considered a full-blown addiction? There might not be an official diagnosis (yet) but I’m pretty sure I’m a junkie. The biggest problem I have with my growing nail polish collection is that I have a lot of old colors I don’t use anymore. Either I didn’t like how they looked or they got pushed aside by a new color. I did a little research and found 5 ways to put these old nail polishes to use. It’s surprising easy to create your own own nail polish colors. You can mix preexisting shades together or use eyeshadow pigments to create a completely new look. So whip out your old polishes and click through the slideshow to see these awesome nail DIYs.