Method of surface finishing of metal moldings

A method for finishing a surface of a metal molded article, comprising the following steps:

• a preliminary finishing step for polishing the molded article by using a buff device having a soft buff and bringing a circumferential surface of the soft buff into contact with a surface of the molded article while supplying the molded article with a polishing liquid to which a polishing powder has been added;
• after said preliminary finishing step, a first polishing step for polishing the molded article by bringing the circumferential surface of the soft buff into contact with the surface of the molded article while supplying the molded article with the polishing liquid to which the polishing powder has been added;
• and
• a second polishing step for polishing the molded article by bringing an end face of the soft buff into contact with the surface of the metal molded article while supplying the molded article with the polishing liquid to which the polishing powder has been added, said second polishing step being carried out after said first polishing step.

A wet buff machining method comprising the steps of:

• supplying a polishing liquid having a grinding powder onto a surface of a workpiece;
• and
• bringing the workpiece into contact with a buff mounted on a rotary shaft for polishing the surface of the workpiece;
• wherein one of the buff and the workpiece is moved so that a space between the buff and the surface of the workpiece is increased during polishing while continuing to supply the polishing liquid, and thereafter moving the buff to approach the surface of the workpiece and to contact the surface of the workpiece with a pressure while continuing to supply the polishing liquid.