As a complete newbie to polishing and having all my knowledge via YouTube I was sure I would screw up the paint. Not a chance. After following the Rupes CORE learning videos and advice I turned a scratched old mazda into a new car. Even polished the headlights. The Mille is amazing and so forgiving and quick to learn. Totally fun too. The deluxe kit has everything you need and it just works. Money well spent and it will save me and my sons thousands on polishing cars. Just do it.