this solution is non toxic, and can be used both for cleaning copper and brass,but also as a toilet/diaper pail/litter box etc cleaner/deodoriser. it can also be used to patina carbon steel knifes. You'll need White Vinegar, preferably the pickling one (7%), and plain old salt. that's it. go for a 70:30 ratio Vinegar to Salt. mix as needed, in whatever amount you like. the results are instant. dip your piece into the solution, remove , rinse and towel dry with soft cloth. once you've cleaned all your copper or brass, use the solution to clean toilets, diaper/compost pails, or to darkly patina carbon knives.
Vinegar is a natural wonder solution. My grandma added it to window washing solutions to help reduce streaking on her windows. @Bushman5 Is the 70/30 mix by volume or weight? It probably wouldn't make much difference either way but I was wondering.
Percentage Honestly I just guess ratios. Dont leave copper or brass on longer than 5 min. You just need to dip the item in .
