"Tung oil", not "tongue oil".
What do you want the finish to do?
Change the color of the items, or not change the color? Some finishes will change the color of wood items to some extent, even without using any sort of wood stain.
How much 'protection' do you want the finish to offer? Not much, not show fingerprints, resist some mild liquid spills, resist most liquids, etc.
Note, even if you want a Satin finish you usually do NOT apply multiple coats of a Satin finish. That can lead to a cloudy or murky finish result. Generally you use multiple thin coats of the finish in a gloss formulation, and then apply just the final coat of finish in your desired gloss level of Satin. This applies mostly to film forming finishes such as lacquer or polyurethane or varnish types of finishes.
Or you can apply multiple thin coats of gloss finish and then rub/sand/buff the finish to end up with the desired gloss level of Satin. You use a variety of abrasives and rubbing compounds to get to the final desired result.
Finishes are all about various trade-offs. Time, drying time, protection, ease of application and recoat, protection level, durability, liquid and solvent resistance, cost, hazards during application and clean up, etc.
