Recently I was making construction paper jewels for my kids and testing finishes. I pullout my clear nail polish that I use and it was tacky. It didn't make for a great finish and was hard to apply. I cleaned the brush with acetone to remove the gum from there but it didn't help.
Is there something I could add to the polish to thin it out or something I could do to give it more life? Yes, I could just buy some more but I am not a fan of waste.