Originally posted by KerryKool:
If you don't mind me asking, but is there a difference between a buffer and a PC?
Porter Cable is really a brand. Think of Kleenex, when the true term is facial tissue.
- Dual-action or orbital polisher -
Like the Porter Cable. It does spin, but when applied to the surface of the paint it appears to just vibrate. You don't see the pad spinning nearly as fast as it does when not on the paint. That is because it rotates and moves back and forth. If you place the orbital polisher on paint, it will begin to move across the paint on it's own.
- Circular / rotary / high-speed polisher -
This is the traditional polisher most body shops use. It spins on one axis. Because the pad spins on one axis at high speed, the pad must continue to be moved or it will burn through the paint. Not recommended for beginners / novices.
| 
