I would recommend Going with a da/ro polisher as it's the best option if your a beginner or enthusiast. It will safely remove paint defects like swirls and scratches with ease without the worry of burning your paintwork.

Where as rotary polishers are recommended more for the professionals, who need more cutting power for severe paint defects. With these machines care needs to be taken as you can burn your paintwork.

I've been using the das 6 pro for a while now, it's very easy to use and it's given me excellent results. And having the variable speed is very handy, as a lot of cutting polishes recommend certain speeds to be most effective but also helps stop polish been flung when you start up.