2014 should be 1914. X is October 1914, XI is november.
to remove the first layer of salt and chalk, I will clean it on several ways. Knocking with a wooden or rubber hammer will loosen a lot. soaking it in water, and heating up the spots with a torch etc will remove a lot, just by expending the brass. At the end a mixture with hydrochloric acid, water and a lot of fresh water will remove the last chalk.
To remove the dents, it will happen in a few stages:
1st stage:
i made two 120 degrees segments out of hard steel, supported with a horizontal plate, see picture. the diameter is the same as the inside diameter of the cartridge case.
with a hydraulic car jack between them, i will line up the plates with one of the dents. Then i put full pressure on the hydraulic jack it will remove 90 percent of the dents already.
2th stage:
After the first attempt, a few dents are too tough to get them out at once. The next step is aligning one of the plates up with the dent, and putting the hydraulic jack on it. I have a piece of steel, small but with the same radius as the case. This piece is aligned with the dent and put on the receptacle of the hydraulic jack. Now all the pressure is concentrated on the dent. then again putting pressure on the jack will remove the dent or even better, just add a bid more material to the outer surface, making a little bump.
3th stage:
Now the two segments are lined up again with the jack in the middle. Hammering with a
Special hammer, hollow and filled with lead grains will flatten the “bumps” and again remove a lot.
Repeating this process (mind your ears, sounds like church, but very close) will end up in a 99 procent dent free case.
After the cleaning an d undenting, the case should be clean and free of damages etc, so grinding with waterproof form 120-180-320-400-600-800 and finally with special brass polish, called Unipol, the best I found out, the case is finished.
Now getting back the old brass look. First wash it with water, several times, and later mix a bid ammonia with it and wrap this with cloth over the case, within days the case looks good and not as a mirror. After it, cleaning it with water/soda will neutralize the most.