If you don't know what you're doing, a buffer can do more harm than good. I sure don't know what I'm doing - not with a buffer, anyway.
I did this the old school Karate Kid way - wax on, wax off - by hand. Very happy with the result, though I have acquired no ass-kicking abilities as a result - just aching arms. Sponge pad for wax on, new, clean terry cloth buffing cloths for wax off.
Jaeger