Can you polish a car by hand?
You can polish a car by hand if the paintwork is dull and hazy. If you have a car which hasn't been protected with a wax, sealant or other coating, there will likely be some oxidation of the paintwork, and hand polishing will be sufficient to remove this dead paint and brighten the car up.
Modern cars have clear-over-base paintwork and are less prone to this problem than they once were. Most people who want their car polished actually want to remove the wash marks and other light scratches. Hand polishing is far less effective and achieving these results, and we would recommend hand polishing.