Recently I received torso of an antique German straight razor. The razor was completely destroyed, whole pieces of the bevel were broken off the blade. I decided to reshape the razor torso into a letter knife. Because the carbon steel is really hard I used fine diamond wheel. 
Jan
			
			
			
				Great job re-purposing the razor.
Is it letter opener sharp or Tormek sharp?
			
			
			
				Thanks, John! The knife bits into my fingernail.  ;)
Jan
			
			
			
				Very nice Jan! You cleaned it up very nicely.
Antz 
			
			
			
				Thank you Antz! For polishing the blade I used smaller felt wheel mounted in a drill press and Tormek honing compound. 
Jan
			
			
			
				Good job; and beautiful razor  :)
			
			
			
				Thank you, Josu! It's a real pleasure to hold such an old beautiful tool in hand.  :)
Jan