While pine is traditionally finished clear or painted, there are other options available to colour the wood, including whitewash. Whitewashing is the process of applying diluted white paint to a surface to create a ghostly, translucent finish. If you are working with wood that has been previously stained, painted or coated with clear finish, it will need to be sanded before you begin your whitewash application. Proper preparation of the surface and the use of thorough application techniques are the keys to a quality, whitewashed pine finish.
Apply masking tape around the edges of panelling that must be finished in place. Since you will be using oil-based paint, which is much tougher to clean up than water-based paint, be sure to use the widest tape available; also cover carpets, flooring and other surrounding surfaces with plastic dust sheets.
Sand the surface of the panelling. If there is a previous finish to remove, start with 80-grit sandpaper to remove the bulk of the old finish, then repeat with 100- and 150-grain papers for the fine details. For unpainted pine, sand with 150-grit paper to align the grain and remove any roughness.
Run a tack cloth over the surface to remove any remaining sawdust from the sanding process. Use a small amount of white spirit if needed, but do not dampen the rag with water, as water will raise the grain and cause an uneven finish.
Combine oil-based, semi-gloss, white paint with white spirit to create a mixture of one part white spirit to eight parts paint. Use odourless white spirit, if available, to reduce the fumes you will be working in. Mix the solution in a chemical-resistant plastic or metal container.
Brush the diluted paint on to the surface with a fine-bristled paintbrush. Choose at least a medium-quality paintbrush to ensure that the bristles are firmly anchored and less likely to pull out and end up in your paint. Work in long, straight strokes moving with the grain. Spread the paint as evenly as possible to prevent runs and drips.
Work from the top of the panel down for best results. Once the panel, or a section of wall about 1.2 metres (4 feet) wide, is well-coated, rub across the damp paint with a smooth, clean, lint-free towel to remove about half of the paint. This will cause the colour to be mostly removed in the high spots and leave white paint in the grain and in any low points, grooves or other details.
Allow the paint to dry and cover the object with a coat of clear finish in your choice of sheen. Brush on the clear finish using a similar technique as the paint; however, do not rub the clear coat with a rag.