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Linseed or flaxseed oil is one of the most beloved wood finishes in the world. It penetrates deep into the wood fibers to protect against minor surface scratches and changes in humidity. It’s easy to apply and maintain and delivers a soft, satin finish that brings out the natural grain and color of the wood.
When researching linseed oil, you’ll find three types of wood finishes: raw, boiled and polymerized. Raw linseed oil, in its natural form, is somewhat impractical as a furniture finish due to its lengthy dry times. This is where it gets confusing…
Both boiled and polymerized linseed oil are marketed as “boiled” linseed oil. Boiled linseed oil isn’t only boiled; it’s often combined with potentially toxic chemicals and metallic driers to speed up the drying process.
But polymerized linseed oil is basically boiled linseed oil without the chemicals! It’s eco-friendly and food-safe, but without the long drying times. Both have their places in woodworking, but it’s important to know which you have.
Always examine the bottle of “boiled” linseed oil. If it carries a warning from the state of California regarding cancer or birth defects, it’s probably full of chemicals and driers. If the bottle of reads “zero-VOC’s” or “food safe,” its actually polymerized, and my preferred choice!
My favorite is Furniture Clinic Boiled Linseed Oil.
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For centuries, tung oil has been extracted from the seeds of the tung tree and applied to protect hardwoods from the elements.
Tung oil is a favorite penetrative wood finish among many woodworkers for projects like furniture, musical instruments and toys. Not only is it moisture and mold resistant, but it doesn’t darken or amber with age. It can be used on bare or stained woods, bamboo, even stone and concrete.
Most tung oil brands recommend up to 60 minutes between coats. As coats are added, the gloss levels increase, leaving a beautiful and warm looking finish. Down the road, when the finish has lost its luster, you can simply reapply a rejuvenating coat of tung oil to keep the project looking great for years!
My pick in this category is Formby’s Tung Oil Finish.