It is very important to always start a waxing or buffing job with a fresh set of pads. This does not mean a new set, but rather pads that are in clean and good condition. Dirty pads will work against you in 2 ways. First, if they are already loaded with wax or compound they will not work efficiently, greatly increasing the time you will need for buffing. Second, a dirty pad, one that may have been stored poorly or has grime embedded in it can really damage your finish by grinding that dirt into the surface.
We have a complete Tutorial in our Clean-N-Simple Videos: