For these reasons, it is often used on the exterior of buildings and for other outdoor uses that require long-lasting wood, such as dock pilings or electrical poles. The golden hue also makes it a top choice for cabinets and furniture. Use a polyurethane varnish to finish indoor cypress wood. If finishing outdoor cypress wood, use an oil-based mildew-resistant wood stain.
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Remove all furniture from the room if you are finishing a floor. If you are finishing furniture or cabinets, protect nearby items with old blankets or a tarp. Protect outdoor plants with sheets of plastic if working outdoors.
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Slip on some gloves to protect your hands. Begin applying the varnish or stain in a corner and work your way across the boards. Use a soft paintbrush and slow, even strokes. If you are varnishing furniture, let the top dry completely before turning the furniture over and finishing the other side.
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Let the varnish or stain dry completely. If you are using varnish, lightly sand the dry first layer with 220-grit sandpaper, vacuum up the dust and then apply a second coat. This will protect the cypress and make it shine. Stains do not usually need a second coat, but if you desire a darker look, apply the second coat while the first coat is still wet.