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I have been buying old brass, projectiles and assembled ammo for a few years now and have a pretty good collection of these items which are corroded and or tarnished. The tarnish doesn't really bother me but the green corrosion is not something I want to spread around inside my dies or firearms. What is the best method to remove the greenish corrosion and prevent it from coming right back. I bought a bunch (about 2400) projectiles today, many of which look like the ones in the pic below. The green stuff is my main concern. I have similiar corrosion on other items I have bought previously including on brass cases.
![20221021_135126.jpg 20221021_135126.jpg](https://data.northwestfirearms.com/attachments/1044/1044230-b470da59ed4cb7e1a390c9282bfce4ce.jpg)
![20221021_135109.jpg 20221021_135109.jpg](https://data.northwestfirearms.com/attachments/1044/1044231-edf0a5d22053fdb95003703260de6678.jpg)