I bought some pure Tung oil from Lee Valley. 

I made the mistake of putting on a thick coat and it took what seemed forever to dry. Your right about applying thin coats. 

I does leave a beautiful finish when it’s dry. 
It’s not for projects that need a fast drying finish. It is great for food related projects. 

Pottz. What type of poly does you mixture require and how long does it take to dry?

James McIntyre