Discovering how to paint WonderBoard can improve the look of interior walls completed with the product. Wonderboard is a building material made of wire and concrete. The substance is sturdy and durable. The issues with Wonderboard come into play when decorating occurs. WonderBoard is highly porous and will absorb paint or stain to the point of being unrecognizable. With a few extra steps, the porous substance can be painted.
Mix concrete per manufacturer's recommendation for use in a concrete sprayer. This will usually require additional water.
Spray the WonderBoard with the concrete sprayer in a smooth, horizontal motion, covering the WonderBoard. Allow to dry for the recommended time.
Spray oxidized paint onto the dried concrete. The thicker oxidized paint will not allow for as much absorption.