That changes things quite a bit. Cleaning depends alot on the type of weapon, and the collectors attitude towards cleaning. Cleaning traditions can vary greatly from culture to culture, but when in doubt gentleness is most advisable. Stabilized rust, or patina, for many antique weapons should not be disturbed as its removal can greatly devalue a piece. There are situations where it can be removed, but again it depends on the piece as well as the collectors attitude towards cleaning. Some collectors care less about money, and more about tradition, so they clean their blades traditionally. However, in general, especially if you think you may eventually sell a piece, this type of cleaning is un-advisable. It is also more difficult to do, and depends heavily on the eye of the one doing the restoration. In general patina removal is unadvisable, because if done in-correctly it can destroy the value of the piece. Live active rust, on the other hand, must be destroyed with a vengeance. Live rust is the bright red rust, that is actively destroying your blade. In general, when dealing with antique blades gentleness is key. Overly invasive cleaning can damage patina.
What I do when I get a new piece, is first to clean it with acetone. This helps remove any old dirt and grease. After cleaning, if there is significant active rust, I scrub very lightly with #0000 steel wool. The logic behind using such a fine steel wool is as follows, the soft steel wool is harder than the non-stable rust but softer than the stable patina, so it will remove the live rust, but break apart when it meets the harder stable patina. If there is alot of rust, or if its stubborn I will soak the blade in a penetrating oil, such as wd-40 and then repeat with the steel wool. For harder rust spots, what I like to call rust scabs, a copper penny or a brass brush can be used. Again the logic is the softer metal will not scratch the hard steel. This type of cleaning is very time consuming, but is the gentlest way to treat the rust. Avoid chemical cleaning such as naval jelly, as it will remove patina. Also, when in doubt do nothing, and just keep it oiled. Repairing bad cleaning is possible, but in the long run once the blade is damaged, the value is lost for good. You can remove 100 year old patina, but there is no way to put it back.