By Hand or by Machine? If you are wanting a good hand polish for your metal then our Zephyr Pro40 is the #1 in the USA for a reason. Zephyr Pro25 is similar, with less cut and a higher shine. Most pro polishers use both. The choice of cloth makes a real difference to how quickly and easily the polish both works and comes off, and also reduces scratching. Don't ruin your hard work with cheap cloths, we recommend the RockCar Roadie. Polishing by machine will get better results faster and can also address more defects. Metal Polish By Machine Want to step it up,...