How would you recommend that I prepare Hardbord panels for oil paints?

Artist Question: How would you recommend that I prepare Hardbord panels for oil paints?

A: Start by applying two coats of PVA size to the surface of the panel. When dry, apply the oil ground of your choice, following the manufacturer’s instructions. Apply several thin coats instead of one thick coat. This allows the ground to dry evenly and maintain its soft texture.