Oil Primed 24mm Birch Plywood MDF Z1 Painting Panel. 60cm Diameter 24mm Circle Birch Plywood MDF Z1 Panel 60cm stretched with Linen. Gesso Primed and Oil Primed. Artist Surfaces produce handmade museum standard economy 24mm Circle Painting Panels for artists. Each painting panel is made using only the highest grade furniture birch plywood and MDF. *Larger or particular sizes can be made upon request. For more information, please email us. Painting panels have a birch plywood surface with a MFD subframe, creating a strong and durable panel with lasting longevity. Each panel is hand prepared so that surfaces are paper smooth.