Gryphon, When I bought my tung oil about 25 years ago I got a 4 litre tin that cost about 50 some dollars then. I got it from a reputable paint and associated finishes outlet and what is posted on that site is about what they told me then. I got vegetable turps (gum terpentine) and would apply it in wet sanding and thin rubbing coats for way more than the 4 soak coats they recomend on the website, depending on the walnut density but up to 20 very thin coats was not uncommon over a number of weeks. I also used it on furniture I was making but for that the fewer soak and rub off coats were the prefered usage. I would also melt a little beeswax into a mix for the final application.