The widely accepted rust prevention for planes is camellia oil. I can’t get that here so I use WD-40. I read somewhere that it has fish oil in it, but I’m not sure that is correct. I have used it without any finishing problems but maybe others have had different experiences with it.
I also use my own thin blend of lamp oil mixed with a little motor oil and that works very well too.
The only steel table I have is on my bandsaw. I do oil and wax that and it works well, but you do have to redo it occasionally. The wax also helps the work pieces slide smoother.
Mike, an American living in Norway