I appreciate everyone's comments.   I think I'm going to try the Rust Eraser and/or the Ballistol as suggested.   I would be interested if anyone had any insight on the human head etching attached.  Most of the rest I recognize from other Kaskara posts.  I've attached an "enhanced" image that has been rotated.
		 
		
		
		
			
		
		
		
		
		
		
		
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