Congratulation to your daab. 
Rust cleaning is close to being scientific, some would say, while others would say it is easy. Both parts can be right - that depends on the rust. Do yourself a favor, have a look at the old threads on the subject, it has been discussed a lot earlier. 
 
Regards  
 
Jens
		 
		
		
		
		
		
		
		
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