opnsysme,
Welcome to the forums.
It would be best if you hold off refinishing the knives until you have had a chance to have someone review the condition. Old knives with a bit of paint or rust, may no longer be in mint condition, but they can still retain some collector value which would be ruined by refinishing. It is not about whether they look new, but rather, whether they look better than the average example available today.
You should also consider that old brown rust and patina, can be very stable, and actually works to preserve the knife; while cleaning the rust off only exposes a new surface to corrosion. Having said that, these are your knives, do whatever makes you happy.
n2s