The National Advertising Division has recommended that Coty, Inc., discontinue certain claims for the company’s Sally Hansen Miracle Gel, including claims that the product produces a result equivalent to a salon gel manicure.   The claims at issue, made in television, internet, social media and in-store displays were challenged by Revlon Consumer Products, maker of competing gel nail polishes.     Coty, in its advertiser’s statement, said the company “supports the self-regulatory process and...