IF you use FeCl mix it with a little distilled water, say 1/2 and 1/2? 
 
Etch the blade and see what comes out.  
 
On the scabbard, the most I would do is place bands of either brass or silver.  Otherwise leave the wood alone. On the blade, it should have a clamp on it, maybe silver, as well as etch it.
		 
		
		
		
		
		
		
		
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