Just make sure your nails stay hydrated and apply a new base coat every few days.

[He reaches over to hold up the clear bottle - the one he'd started with before applying the color.]

That's what this is. It helps the polish to stick, and also provides a bit of a barrier against wear and tear. You can take the rest of this bottle with you if you'd like.

[Since she'll probably have trouble finding a place to buy some on her own, considering she's just learning about it now.]

I'll start on your other hand now, and then I'll do your toes to match.