oh yeah , just to note, the first time I used a polisher I did not get results either. I was sure that I was mimicking what I watched in video's and was instructed . but it turns out I wasn't.
compounding or heavy polishiing out paint takes more pressure and slower arm movement than what you would think would be correct. If your working on hard paint, and it takes you forever to finish a panel, and at the end of the panel you say to yourself " this is crazy, this is going to take forever to do this car" and you want to quit the job right there and go back inside, your probably doing it correctly.

LOL. seriously.
If your souring through the panels and finishing compounding in 2 hours on your first attempt using a polisher. your probably doing nothing but cleaning off the paint really nicely.
compounding or heavy polishing out swirls and scratch's is a lengthy process and the most time consuming. After that you can do bigger sections and move a little faster, but always be sure to break down the polish's correctly.
If you finished a 3!!! step paint correction, then sealed the cars on 2 vehicles, both in the same business day (8 - 10 hours) by yourself, and its the first time you used the polisher and compounds together, (not even including washing, decon and prepping), then its likely you just flew through the process without actually removing the defects. I could be wrong, but I know polishing out swirls on hard paint is a lengthy process.