The invention relates to a method for modifying a wooden surface (7) where an electrode (1) is arranged opposite to the wooden surface (7) to be modified, and an alternating high voltage is applied to the electrode (1), in order to cause the discharge (11) between the wooden surface (7) and the electrode (1) under atmospheric pressure. A dielectric layer is arranged between the electrode (10) and the wooden surface as a counter-electrode (7) to be modified, and the alternating high voltage is applied with a frequency greater than 600 Hz.
An apparatus for preparing a finger nail or a toe nail for a coating in that a gas discharge is ignited above the nail at atmospheric pressure comprises an electrode to be arranged above the nail, and a high voltage generator generating a high voltage to be applied to the electrode arranged above the nail for igniting the gas discharge between the electrode and the nail.
