hey Dave, to be honest, I wouldn't use a mechanical buffer anything stronger than a random orbital type buffer, unless you practice a lot on a car you don't like too much.
I have a professional, high speed buffer which works great, but can be dangerous. and I also have the random orbital buffer that in my opinion is worthless, you get no better results than if using your hand alone.
I used the high speed buffer on my Midget and I brought the paint back to life in about 2 hours work. the car with original paint looks great.
BUT, I had the luxury of practicing on my wife's car first, and did her car pay for it !! swirl marks all over the place !!! and I did burn through the paint on a high spot on the front fender (don't tell my wife. it is an art form using a high speed buffer that delivers results you could not get any other way. but if your paint is already in good condition there is no reason to use it.
my favorite wax is Mothers Pure Carnauba Wax, liquid form.
https://www.amazon.com/Mothers-05750-California-Carnauba-Liquid/dp/B0002U1TX0
the product goes on easy, and buffs off even easier with a great shine. and because it has no cleaners, you can apply as many coats as you want.