Electrocurtain coating process for coating solar mirrors

A method of applying an electrically conductive coating over a first surface of a reflective coating of a solar mirror, wherein the solar mirror comprises a substrate having a first major surface and an opposite second major surface, the reflective coating having a second surface opposite to the first surface, wherein the second surface of the reflective coating is over a major surface of the substrate of the solar mirror, the method comprising:

• moving a first electrically conductive liquid material over a first area of the first surface of the reflective coating;
• moving a second electrically conductive liquid material over a second area of the first surface of the reflective coating, wherein one of the liquid materials comprises an electrodepositable coating composition;
• maintaining the first and the second electrically conductive liquid materials spaced from and out of contact with one another to provide a third area of the first surface between the first and the second areas to establish a current path through the first liquid material, the third area of the conductive surface and through the second liquid material, and
• moving an electric current through the current path to deposit the protective coating over the area of the first surface of the reflective coating having the electrodepositable coating composition.