Apply wood conditioner evenly across the surface to be painted and allow it to dry.
Apply a thin layer of shellac to seal the plywood. Allow the shellac to dry fully before topcoating.
Mix one part mixing glaze with one part oil-based paint and one part mineral spirits. Stir or shake the mixture until it is evenly blended.
Apply a thin coat of the mixture evenly across the plywood. Allow the coat to dry fully. If a deeper color is desired, an additional coat may be applied.
Topcoat the painted surface with shellac. Whitewash is less-durable than unthinned paint and the shellac will help prevent scratching and scuffing.