1. Rodney is 100% spot on.
2. I've had this plating unit for over 25 years. I used to make Jewelry, and now my DD is learning.
3. brush? ewww. Tank. but understand that there are SERIOUS safety risks with plating. Electricity, chemicals, and fumes. There is reason there are not many companies left doing this, it is prohibitive for insurance and regulatory reasons. It is OK to do at home, just be cautious and diligent about your safety.