The simple way she wears her nails would be easy I think! Just file and paint or not paint! When I was holding Braelyn yesterday, I thought I had better cut mine. They grow so long and I do have to cut and file them. Every now and then they will go through a period of breaking easily. This time they are growing fast and furious. I wear gloves only when I am using harsh cleaners, etc.
You have obviously been blessed with good nails. Mine have ALWAYS been paper thin and brittle. They split and chip and even peel. I have tried all kinds of vitamins and polishes and ‘strong nail’ applications. Nothing works - and never has.