In my experience, Saphir Renomat is more potent than acetone when it comes to remove finish. A warning, based on very offensive smell alone: I would advise to use in well ventilated area and to immediately follow with good leather treatment such as Bick, Lexol or others. A little goes along way. Do not scrub .. light touch.Thanks guys, i just do shoecare for 3 weeks so work with aceton is a bit too much and risky for me at this level. I'll buy renomat and try it with it. Wish me look because I totally love the other shoe and would like to make them both walkable