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How do I remove lime/calcium ? and not patina

upnorth

New member
I found a cool badge/key fob ? today and H.P. isn't removing the mineral deposits. My dilemma is how to do this without removing the patina. Any tips are appreciated, thanks.
 
Have you tried white vinegar.

I have very hard water and no water softener. We use a little white vinegar on a rag to make all the stainless shine.

Only takes a few minutes for the vinegar to take off lime and calcium.

Not sure what it will do to the patena of a coin though. Maybe try starting out with short durations in the vinegar
then rinsing with water immediately afterwards.
 
Thanks guys. I have some letters under a blob of crud that is stopping me from an I.D. If I strip the patina it wont be the end of the world for me.
 
I would like to help, but I do not understand some words.
I think each material and each concreteness has a cleaning method. Deposits that originate at sea are facilemente removable with vinegar. Also the crust that forms on the lead disappears with pickled. Lime or calcification as I have said, with vinegar. Vinegar is degraded by dissolving the lime must be added vinegar cleaner. The silver which comes from the clean sea with household ammonia. The dirt encrusted coins put it in distilled water one or two days.
I hope to be helpful
 
You can't. Vinegar will dissolve the lime and the metal. Using ultrasound will remove the lime and pit the metal. The best results will be from burring the find or tumbling polishing.

https://www.youtube.com/watch?v=cbuiV3RJou0
 
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