Another option is equal parts white vinegar, flour, and salt. You can let this polish sit on the brass up to an hour. [6] X Research source
Let the paste sit for 30 minutes to an hour if the brass is especially dirty.
If the item is too big for a sink, try soaking it in a bathtub. You can also spray it on generously and let it sit for a few minutes. Spray on more if it looks like it’s drying out too quickly.
You can also try plain lemon juice. [10] X Research source
