For those like me who wasn't familiar with the word Tombak, it is a copper/zink alloy often used as a jacket for those modern things we don't talk about.why did no one reads the description of Ballistol ? It was also made to remove Tombak in the bore.
This oil is not neutral it´s alkaline, it´s a good oil but not for many nonferrous metals .
I found this discription of Ballistol on the web and after getting it translated it says:
"The essential ingredient of Ballistol is medical grade white oil. This component serves as a lubricant and corrosion protection. The alcohol components have a disinfecting and preserving effect. So that the two can be mixed, oleic acid is available as a detergent. Together with the alcohols, it also enables a water-displacing and dirt-dissolving effect, but also makes the oil film washable. Ballistol forms a milky emulsion with water and, according to the manufacturer, has a pH value of 8 to 8.5 (alkaline). As a weapon care product, the oil can be washed off the weapon parts by water and then loses its protective effect. The alkaline reaction of the oil has a good cleaning effect: metallic smearings in the gun barrel (tombac, lead) can be removed relatively easily. This also applies to the combustion residues of propellant powder. The reaction with brass, copper and their alloys leads to the deterioration of weapon parts and ammunition made from these materials. Applied as a metal care product to brass and copper, it has a slightly oxidizing effect, which is why it is suitable for cleaning, but not for preserving these metals. "