I use either NailTique or OPI double duty base/topcoats. I have way too many colors of nail polish, but it's so much fun to get new colors. My newest are "Posh" by Revlon, and "Tourquoise & Caicos" by Essie. I love that Essie comes in smaller bottles, bc I am more likely to use them up. I hate throwing away polish because I have too many and never use them all up.