Hello, this is my first post here. I was cleaning some brass to reload, and decided to try a method I saw on youtube. It was 1 quart water, 1 cup vinegar, 1 tablespoon of dawn, and 1 tablespoon of salt. It cleaned my brass pretty well, but it left some of it discolored. I hadn't seen this before and I just wanted to confirm it's safe to re-load before I use it. Please look at the picture below and confirm it's safe. Thanks!