Of the many hair-removal techniques she knows about, aesthetician Shanequa Johnson prefers the ancient, versatile method of threading. In the right hands, she finds that a loop of pure-cotton thread can sweep across the entire face to leave skin completely free of fuzz or sharpen eyebrows into suave arcs. Her eyelash tinting-and-extension services augment her eyebrow-shaping specialty, leaving the entire ocular area looking both sultry and cool, like a popsicle in a sauna.