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Are you sure about that?

Pure tung oil is derived from the Tung nut. I have read time and time again that it is not toxic. The aroma should be nutty and should not cause headaches. Are you sure you're not thinking of so-called "Tung Oil Finish" which is basically diluted varnish? Pure tung oil is expensive (around $10/pint), takes days (not hours) to polymerize, and is pretty much only available at real wood working stores. I find it does wonders for all types of wood (ordinary red oak but especially birch and maple are stunning when oiled!). Tung oil penetrates, darkens the grain like a stain, and litterally lets you see into the wood. It's a very 3D looking and striking finish. Tung oil finish just looks like, well, a plastic coating sitting on top of the wood. Use it for what it is - a wiping varnish.

I would also consider "Boiled" Linseed oil to be very toxic, unless it's labled as food grade. Most "boiled" linseed oil is not boiled, but has chemicals and heavy metals added to make it polymerize (aka Japan Dryer). True boiled linseed oil is usually sold as "Salad Bowl Oil". I've also heard it can be obtained as "Omega-3" at health food stores.


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