Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good stuff!!!

Great product. It works great on even tough patina'd brass. Had to really break out a sweat to clean up a brass lamp that was majorly patina'd but in BlueMagic's defense, the lamp had been outside in the elements for approximately 30 years. I think this is the best product to do this kind of job that I've used yet and I've used many.