Hello Marius, thanks for you comments. When I have a little more time I will do as you suggest and test for wootz. 
 
I have been checking some cleaners we use at home for various jobs and wonder if anyone of these would be suitable for etching the steel. 
White vinegar. 
 
Brick acid ( 19% HCl ). 
 
Toilet cleaner ( 9% HCl ) 
Regards 
Miguel
		 
		
		
		
		
		
		
		
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