I tried mine with the home made mixture of 4 parts water, 1 part vinegar, drop of salt & washing appliquéd. It was OK.
Then I bought some Lyman Turbosonic & Wow, what a difference. It transforms the results and you get really sing brass out. I use the concentrated mixture (20 to 1) so get 16 cleans for the £8 bottle, but each one does 40 to 50 cases at a go. Will see what it is like with the weaker solution some time, but TurboSonic is worth looking at.