Restoring the metallic part on enammel pins

[Litwa]

Hi, I have three of theese relic condition enammel pins and I would like to know if there's a way to restore the metallic part of theese pins for it not to be brown/rusty colored and if possible shiny. I have cleaned theese already with a baking soda paste and it was a big improvement but I want to attempt to clean it further. I would also like to minizmize the loss of the remaining paint on the pins. Also I have no idea what the green spots on the deutsches frauenwerk pin are (prob some copper residue) and I would appreaciate for any info on how to remove it. Thanks in advance for any help.
Best regards,
Litwa

[Litwa]

Experiment with this (Rust removal using Citric acid + Na2CO3 mixture) derusting solution that worked great on normal metal, with trying to clean one of my enamel pins (I got this DJH as a 'extra' along with a HJ pin so I didn't really care that much if it got damaged). And theese are the results... Does this count as improvement or a ruin? I mean it's definitively way brighter than before. You can't see it in the photos but the metal is almost pink, like my skin colour. I don't know if the pink colouring was caused by corrosion and only hidden by the dark coating of rust(?) but I'd rather it be white/silver instead of whatever this is, so I'll be working on making it silver in the future.
Best regards,
Litwa

[thecyclist64]

take a few drops of white vinegar and dilute with 50% water. Add table salt to the mix and then use a cotton bud/Q-tip to clean the item. This is what I did with my Kreisieger badge

[Litwa]

Had no effect on the DJH pin but worked wonders on the HJ pin that was also corroded. Don't have any good before and after pics but I think it looks a lot better
Big thanks on this one!

[thecyclist64]

Litwa, you could always try leaving the DJH pin in a glass of the solution that I recommended for about 15 minutes and then wash it off in clean water. That might help

[Jack59]

Hi Litwa,
You're getting there.
I just finished cleaning those push buttons from "vertdegris" who appears often on brass parts. I used toothpicks to remove chunks off (no metallic tool), then brush the smaller remains with a dry toothbrush. Finally dipping one tip of a Q-tip in vinegar, clean the location then dry by switching with the other dry Q-tip end.








One of your badge seems to be made from copper?

This someHow could help:
How to Clean Copper Jewelry: 13 Steps (with Pictures) - wikiHow

Regards
Jack

[Litwa]

Tried soaking 2 diffrent pins in the solution, had no effect on the DJH pin, but i soaked a Deutsche Frauenwerke pin and it just turned parts of the pin into the beforementioned copper color...
Maybe theese pins were copper and plated silver and the plating has worn off, but I couldn't find any example of the exact DJH pin model I have so It's just a guess.
Cheers, Litwa