Looking for militaria from 38. Batterie, Heeres Küsten Artillerie Regiment 977, also from 31, 32 and 36. Batterie.
[QUOTE=Datrus;450593]So here is the end result of the helmet cleaning after 5 days. Quite ok i think, but oxalic acid will of course be better. It was more meant as a data point if oxalic acid for some reason is not available. It's possible to do this with venegar, even heaviliy rustet items. I even got the maker stamp out! It's an ET62.
Attachment 289461 Fantastic result! To get the makers mark is a bonus well done Lars and thanks again.
Is vinegar good at breaking down chalk deposits, or do you recommend another method? i have several pieces from the Somme that I haven't been able to remove it from.
***Engage chemist mode****
Well, chalk is calcite or calcium carbonate (CaCO3). Vinegar is acetic acid (HC2H3O2) in water. If you pour vinegar on a piece of chalk, the chalk will dissolve giving off carbon dioxide and the salt calcium acetate.
2 HC2H3O2 + CaCO3 -> Ca(C2H3O2)2 + CO2 + H2O
***Disengage chemist mode***
In other words, it should dissolve it, if it is indeed chalk.
Last edited by Steve T; 05-27-2013 at 11:34 PM.
The best results I've achieved is to soak the cases in vinegar for half an hour or an hour maximum then wash thoroughly in water. After that, pop them in an electric case tumbler filled with crushed walnut shell medium, with 2 or 3 capfuls of Silvo liquid silver polish. Silvo does a better job of tumbling brass than Brasso brass polish, for some reason.
Tumble them for a few hours and they come up almost like new. I wouldn't do it with anything that still had live primers, though, just to be on the safe side.
Great thread thank´s for the info. I would never have thought of white vinegar but my bullets came up a treat.
At the moment cleaning up a German belt buckle which i found in the woods. Using lemon juice on this and it´s eventually going from complete rust to something resembling a buckle.
I will post a before and after pics once it´s cleaned up