+1 on the Porter Cable.
I just used my Porter Cable for the first time last night. I admit I was pretty scared to try it since threads recommended to work the polish in with setting 5 or 6. Man...6 is crazy!! I could barely hold it in my hand and you wanted me to put that on my new paint...no way I thought. But it did turn out really nice for me being a newbie to all this.
BTW...I was using the Menzerna Super Intensive Polish PO83 and it worked great. I also have the Finishing Polish (nano) and the Finishing Glaze. I've seen really good results with all of these. I also have the Swissvax Blau Weiss which hasn't been tried yet. Thats for this weekend.