Razor Steel knife

The Finnish knives we recommended need stropping. A razor blade factory has machinery or it can be done like this:

Dull sand paper smooth glued to a 2 inch wide, 10 inch long, 1 inch thick softwood. On the other side glue a strip of leather bend or shaving razor belt. Avoid taking metal filings to the leather.

Alternatively use an oil stone & the belt. If you can shave your arm it's sharp.