WRITTEN BY Lesley Holland Downey Charleston is one of those cities that just gets better in the warmer weather—everything is green, lush and lively. And because Southern women love their beauty products, I knew I’d find gold in some of Charleston’s specialty stores. They carry brands you already love and specialty lines that you may want to try. I visited Cos Bar, Bluemercury and Stella Nova in the shopping paradise of King Street. You could spend an afternoon or more in these stores alone—they …