What is the best method for applying joint compound to wood surfaces for a smooth and seamless finish?

The best method for applying joint compound to wood surfaces for a smooth and seamless finish is to first prepare the surface by sanding and cleaning it. Then, apply a thin layer of joint compound using a trowel or putty knife, making sure to spread it evenly and smoothly. Allow it to dry completely before sanding and applying additional coats as needed for a flawless finish.