Whirlpool baths and vibrating massage chairs purr and hush at For Your Nails, punctuating the sound of rasping emery boards in the hands of certified technicians. Inside Accents Salon, which has operated for nearly three decades, they draw on an arsenal of Shellac and gel polishes, available in a range of colors unlike boring SWAT-team uniforms. At workstations, UV light cures gel polish into place and acrylic nails augment digits.