Boy its a good thing I brought my lap top with me. I detail cars as a profession and I only use a high speed buffer on SERIOUS paint imperfections. (Swirl marks/ scratches/ etc) Here is the technical definition. High speed/ operates on a single rotation at variable speed.This type of rotation will produce heat which if used improperly will cause serious damage. The heat is needed to break down cleaners and compounds in order for them to do their job. I would NEVER use a high speed on a new car.
Dual Action Random Orbital/ the movement of this machine is two functional. The heads not only spin on access (as on the HP) but they also move in a orbital movement. This type of movement does NOT produce any heat, so it makes it much safer to use. The downside is it has its limitations. It is perfect for the unskilled detailer, but restricts any type of serious paint correction. So if you want to use it for applying cleaners/ waxes// or sealants, it is fine. If you have scratches or other blemishe, you will be limited to what you can accomplish. Hope that helps, for more information visit
www.perfectautofinish.com