Celebrity manicurists explain the difference between various devices, and share their top tips for choosing a reliable one ...

gel polish, and a top coat (each layer is cured with a UV light). Similarly, once a hard gel is applied to the nail or onto a pre-shaped plastic extender, it must be cured with a UV light.

Over time, my collection grew from the nail lamp, polishes, and tools to protective wear. “You should apply a sunscreen of 30 SPF or higher [to your hands],” says Gina Edwards, celebrity manicurist ...