Polish effectively. Really gives gloss to old guitars (folk tried on 79 and ube 76) and a lasting effect. The thin film that remains after application gives a pleasant feeling of softness when taking his guitar by the neck. Obviously will not shine nitrocellulose mats. The application requires attention: Use a soft cloth without flaws, especially on varnish "mirror" as my Ovation because otherwise we just have a false impression of scratch and then have to rub hard to get rid of. The product and its smell reminds me polish for car bodies !!!!