Ok,  "pitting" normally brings to mind the condition of the bores,  the inside of the barrels, how are they?  
 
The gun (admittedly i am looking at it on the phone) looks good to me. 
 
The out side finish has some "patina" but i do not see where rust has caused any pits in the metal. 
 
I am sure other who can see the pictures better will comment,  but other than some dings in the wood, with my limited view - it looks nice for its age.  I would say do not do anything to it until it has been evaulated by an expert.
		 
		
		
		
		
		
		
			
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				"If there is a heaven it must have thinning aspen gold, and flighting woodcock, and a bird dog"  GBE
			 
		
		
		
		
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