I have very thin nails.  All I did was file my nails, wash my hands then apply the Perfect Formula Pink Gel Coat.  It dries fast and doesn't have a strong odor.  My nails were also instantly hard and pink.  I applied an additional coat two more times.  After a week, I removed the polish and applied a fresh coat.  This could be worn alone, or under your favorite color.  It saves you money on manicures so for that reason alone, it's worth every bit of $30!