I have an old axe head, kind of a family heirloom, that I want to clean and restore. Given its age (approx. 60-70 years) and condition, my goal is not to make it usable as an axe, but preservation and possibly use as decoration.
To be clear, there is no wooden handle, I'm only asking about the metal part.
I have started removing loose rust using sandpaper and WD-40. However, even where the loose rust is removed, the metal surface is very pitted, and I was unable to remove rust from these pits and indentations (some 1 to 5 mm in diameter).
I am asking for advice (and/or resources) on removing rust from this pitted metal surface. I don't need it to be 100% smooth and polished and shiny, but I want to prevent further rusting and give the old piece a decent look.