Save your money
I agree with the others. As someone who has owned and managed auto detailing shops, as well as being involved in several restos, save your money and use a high quality wax from Meguires or Mothers etc. Purchase a reasonably-priced orbital (not high speed) buffer and you will get professional results. You can use the orbital to apply and remove the wax. You can get a decent orbital for under $100. Get some extra terry cloth pads as well. A high speed buffer is good for removing deeper scratches, overspray etc., but if you haven't used one before, get someone who knows how to handle one to teach you. It's too easy to burn the paint or damage trimwork on the car if you don't know what you are doing. Keep wax off of textured/flat-finshed areas and work in the shade and you can get great results.