Nothing is infected Apo, I'm looking at normal here. 
 
Pick off the hard rust with a small, sharp tool. 
 
Get some coarse steel wool and some powder sink cleaner, give it a good scrub under running water. 
 
Dry it and put it back in the vinegar. 
 
No fluid is magic, it is just a substance that helps you to get the job done. If I look at the pics of this blade I can still see a lot of what appears to be rust. I suggest you pick this off, scrub it off, as I have advised above. 
 
When the thing is clean, dry it thoroughly and then either stain it or spray with WD40.
		 
		
		
		
		
		
		
		
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