A lot of us use this product while wet tumbling our brass. I've been getting mine at Bi-Mart and they aren't stocking it any more. The active ingredient for Lemi-Shine is Citric Acid. I did an on-line search and got 5 lbs of food grade Citric Acid shipped to my door from Wal-Mart for about $18.00. I've tried it and it works just like Lemi-shine at 1/2 the cost.