Tung oil can be beautiful when applied with patience. Air brush on, or wipe on with cloth patch. Let dry completely before adding new coat. Steel wool every 2-4 coats. Eventually, the grain will fill in. Last coat, steel wool. Then buff by hand with polishing compound for a car.
I might add, make sure you remove COMPLETELY all traces of steel wool dust before adding another coat, or it'll show up in the finish.
Don't be surprised if you end up with more coats than you planned. I once used 26 coats on a gunstock.
Dan