Since I have very thin and brittle fingernails I had the opportunity to test numerous nail hardener. Since this conclusion is to test with! There is no better nail hardener! The paint is easy to apply and dries really fast!
If the paint is drawn he looks quite transparent, so it is advisable to apply a second or third layer - as the paint dries quickly so this is really not a problem. The paint lasts a long time. I paint only once a week.