Actually he is talking about a "rotary" buffer. Rotary indicates a circular motion like an electric drill. What you have is an orbital polisher in which the pad rotates in a circular motion but, the shaft also "wiggles" back and forth so that the pad is never in one place long enough to generate enough heat to do any damage. What I suggested is somehwere in between those two machines.
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Orbital polisher, also called random orbital polisher typically found at auto parts stores, sears or other discount stores.
Dual action polisher, made by Porter Cable. Adjustable speed, action similar to the orbital but can run at much higher speeds.
Rotary buffer, pad spins in a circular motion like an electric drill. Requires some skill to master. As I said before it can and if used improperly WILL burn through paint faster than you can blink an eye or say "repaint"
There is no reason to fear the rotary though if you use good judgement and practice on something other than your pride and joy. You might also want to do some research on the proper pad and polish selection which also wouldn't hurt with the orbital or dual action polishers as well. I would read all I could find on sites like
www.autopia.org and
www.showcargarage.com for starters.