To an outsider, this is mind-blowing: since most of the history of life on earth has been the history of micro-organisms, the evidence for horizontal transfer suggests that a mainly Darwinian account of evolution may be only the latest version, applicable to the most recent, much more complex forms of life.
You apply tung oil just like linseed oil or oil/varnish blend, but you have to sand tung oil after every coat, not just after the first, and it takes five to seven coats, allowing two to three days drying time between each, to achieve a smooth, attractive sheen. or several weeks :
1 2015-02-20 JAMES STEMWEDEL: 2  Raw linseed oil is just flax oil, which is non-toxic. 3  Boiled linseed oil contains solvents and other additives (which can include heavy metals) to make it dry more quickly. 4  Once the boiled linseed oil is dryed, it might be safe for food contact, but I would not use it for that application.