I have used Tung Oil on furniture, but on models I have used Danish Oil and Minwax Wipe-On Poly. Without knowing the proportion of "oil" in Danish Oil, I have a concern of glue adhesion to it, as I most often finish smaller parts before mounting. I feel better about the Wipe-On Poly as it is more of a varnish, and super-glue, especially, works well with it. Recently I have switched to a MinWax water-based Wipe-On Poly, as it saves a lot of time and smell when cleaning brushes, and I no longer hesitate to coat a single part at a time. So far, it works well. Not as warm as oil-based, but that's okay. I'm not sure I'd use the water-based on furniture, but for smaller areas at least it works fine.
I use a clear satin for these finishes, but as adding stain and differing number of coats, as well as super-glue, results in differing gloss, I am considering a coat of matte spray when I am done, on the outer wood portions of the model, to help blend the finishes together.