As I have already tried Shellac, however, was not satisfied with the brand, I thought I try once CND Shellac from. The product has actually exceeded my expectations, because it is applied very thinly, keeping as promised. With thin nails a relief compared to daily repainting and if you often feel like you just can new color is painted with a different nail polish over it. Only when you have to remove the varnish be careful not to use nail polish remover containing acetone.
Expensive, but it does what it should and as it can be applied very thinly probably also very economical.