I have a 5000 square foot house all done in walnut. The customer wants it finished natural with tung oil or something similar. Iíve worked with tung oil some, but only on small pieces. Iím trying to figure out a good way to finish this amount of wood without taking too long. Is spraying and wiping an option? Any ideas or articles you could point me to would be great.
From Paul Snyder, forum technical advisor:
I'd use a product like Waterlox original. It's a tung oil based varnish that dries overnight and can be lightly sanded smooth and recoated the next day. Looks great and offers better protection than pure tung oil. You can spray and wipe if you want. I have done it many times, but only in a spray booth. The overspray with any oil-base finish product will take longer to dry than any of the regular spray finishes. As a result, the overspray will stick to stuff however far it travels before it settles. You could end up with overspray on the other side of the room (all over the big screen TV for example).
Also, would the waterlox be a good product for the exterior of the walnut door? The paint store suggested Watco teak oil. Sorry for all the questions, Iíve done all my wood packages with precat lacquer, so this is all new to me. Thanks for your help.
Waterlox original isn't a good choice for an exterior door. You want a finish with UV inhibitors to reduce the sun's damage to the wood and the finish itself (UVAs and HALs). Exterior rated finishes are also more flexible so they don't crack as the wood expands and contracts with the changes in temperature and humidity.
No matter which exterior clear finish you choose, it will need to be sanded back and recoated on a scheduled basis to avoid failure. If the door is in direct sunlight, the time frame will be shorter than if the door is shielded by an overhanging roof. The amount of time can vary depending on the exposure and the product.