Tru-oil won't wipe off lettering in my experience.
The sealer and filler is for open pore woods like walnut and does just what it says if you put on enough coats.I just sealed a walnut flintlock stock with it, it filled the pores.
The sealer is made to be sanded down after you fill the open grain. It is not a very durable finish and will wear off quickly. I put it on my almost finished flintlock fowler so I could test shoot the gun and not fill the stock pores up with black powder residue. It worked fine for this but the sweat of my hands wore it back down to bare wood. It is a good grain sealer not not a good finish.