Hello Green, 
 
I think that Javanese collectors will clean and etch their keris blades as well. A keris from Java, Madura and Bali has pamor and to show the pamor is what it is to intended to do IMHO. A Malay keris don't have pamor normally and don't get a warangan normally. 
I agree also with the statement from David in up.  
Here is a blade from Java from my collection before and after cleaning and warangan.  
 
Regards, 
Detlef
		 
		
		
		
			
		
		
		
		
		
		
		
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