Anyone try Bar Keepers Friend in their tumbler to clean brass? I look at a couple of stores and couldn't find the lemon shine product that is popular on here.
Have you tried Walmart? My local store carries it in their dishwashing/dishwasher cleaning products section. The actual product name is Lemi-Shine and it is a hard water/spot remover additive... hence why it is in the auto dishwashing product section. Good luck!