Solid choice!So far I'll apply two to three coats of poly on the outside and apply tung oil for the inside of the bowls.
I imagine the tung oil was offered as a more natural alternative to poly. It would have impregnated the wood to improve water resistance. With poly on there, that is not possible. It may have worked if you applied the tung oil before the poly and let it dry thoroughly.I applied 2-3 coats (3 coats on my DR Harris bowls). Really glad I did as the 3 coats really brought out the color and grain of the wood of the D.R. Harris bowls and sealed in the stickers and paper ribbons. I'm happy with the result. Now I need to figure out if I need to sand the inside of the bowls before applying the tung oil?