Early german hunting hanger, cuttoe

[Rather]

Hi Valjhun,
sorry, I am not an expert for restoration, moreover, I do not like old weapons looking like new due to too intensive cleaning. I would only clean it with a good oil (I use Ballistol http://www.klever-ballistol.de with good results, it is also good on leather and wood) and try to remove loose rust with a soft brass wire brush, which leaves no marks on the blade.