The stylish way to keep cool down to your fingers and toes is to paint on an icy, metallic shade of polish like Mischa Barton, as seen in the June/July issue of StyleWatch. This summer, it's all about metals in every shadeâ€"think metallic black like Hit Me With Your Best Shot from Lippmann Collection, $15 at lippmanncollection.com, and the cool bronze of L'Oreal Paris Goldy Lucks, $5 at ulta.com. And Essie's Loophole, $8 at essie.com, paints ...