Lisa, I use fortify when some people struggle to keep gel Polish on. I use ink products add fortify over Base very thinly for weak nails for added strength or on top of Polish to prevent chips. I've found with ink that you have to play around a little. But always keep the layers thin, and use 3 coats on the majority of colours. Some say to only cap Base coat, 1st colour coat and top-rock coat. Also keep the Base very thin too. They have a new product bonder coming soon to use under Base coat, to help with longevity that's meant to be brill