Dual Action Polisher
The first thing you will need to get if you are going to get serious about auto detailing is a dual action polisher. The dual action provides both rotary and oscillating motion, which makes it a lot safer to use to avoid ruining your paint.
We recommend the Meguiars because it's more quiet and comfortable than some of it's competitors in the mid-level price range. It has a feature called "cruise control", which basically adjusts the torque automatically depending on the pressure you are manually applying to the tool. It also comes with the 5" backing plate and a canvas bag for storage.