droin, what I can see from the pics you have a nice HENCKELS Feldafing bayonet. HENCKELS are more rare than the EICKHORN Counterpart (only the EICKHORN oval mm may be more rare, there is only one up to now grin).
Personally I would not remove the rust, it�s "patination" from about 60+ years and if removed the grip still will missing it�s nickle plating. So why changing the appearance? Just a small amount of weapon�s oil to prevent from further (deeper) corroding and you have an artifact of history.
Regards,

wotan, gd.c-b#105

"Never look for sqare eggs" as a late owner of an original FHH-dagger used to say.