Someone asked for some tips, these are a few I have picked up that I didn't see covered elsewhere.
Excess polish, after a few panels as the pad starts to get more polish on it, I like to use it on the windscreen. I always have the brush to help clean my pads after a few panels, but this also helps get rid of any excess, and your windscreen will be the cleanest you've ever seen!!!
Plexus - excellent cleaner/polish for your glass and plastics around your vehicle. I use it on all my headlights, taillights and windows, I've even found it's safe on window tint film.