The nail salon business is now worth more than $6 billion a year, offering a clip, polish and more for at least $15 a person, according to a Reuters report.Experts said corporate professionals, busy moms, college students and prom-goers are all rushing to surrender their hands and feet to reflexology, paraffin wax dips, hydrating masks and salt scrubs in these salons. People are also getting their hands buffed and shaped for big events like job interviews at which they want to impress. Some peop...