Dusting powder is a wonderfully nostalgic treat. It’s not a strictly necessary grooming ritual, but the act of patting a fragranced powder onto the body with a fluffy puff can make anyone feel like the flawlessly beautiful star of a 1930s film, even without a bias-cut satin gown or an Art Deco dressing table. Of course, the use of talc to scent and soften the skin predates Hollywood by a few centuries, so it seems appropriate that some long-established merchants are keeping its tradition alive. Penhaligon’s is a perfumery founded during the Victorian era, and Colonial Williamsburg is the recreation of an eighteenth-century city; appropriately enough, both offer body powders scented with violet fragrance…