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Old 8th July 2021, 07:54 PM   #13
francantolin
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Join Date: Sep 2014
Posts: 622
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I often used ''gentle'' acids like regular coke for remove rust and keep a nice patina , the koftgari isn't damaged.
a solution with diluted ferric chlorid works too.
vinegar is ok but, as mentioned, often the steel turns dull...

on the other side of the PH scale, baking soda is ok to turn rust over and preserve silver or golden koftgari
,only problem: sometimes it cleans and shine too much. and all patina is lost...


PS: I do that when the kofgari is no more visible and covered by rust, In your case,I find too its ok so just a little oil/''magic''WD40
will be good if you are afraid to lose some kofgari or aged patina...
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