Just read this thread through from start to finish and it's weird to think how much time, effort and money I used to spend on 'detailing' my cars.
I bought a DA polisher way back before they were even available in this country, so my Porter cable has an American plug. But to answer the question posted a few pages ago, they are, essentially sanders - you just need to put sanding discs on them.
The reason I bought one of those as opposed to a rotary polisher is because it's harder to burn your paint if you get it wrong. Not impossible though.
Back in the day I'd spend 9 hours cleaning our then car - a Black MKI TTC. But this was all BC (Before Children). Once we sold that car and bought an estate car, I still did it for a while, but lost interest (and spare time).
Back then, snow foam wasn't really a thing, but I have got a proper snow foam lance and the correct snow foam stuff, but I've not really been that impressed with it. The thing that made the biggest difference to cleaning an untreated car is a clay bar.
I helped a mate of mine clean his car before he sold it, and he was staggered with the amount of crap that came off.
Some of the tips i picked up along the way...
Don't do the classic Karate Kid 'Wax on, wax off' circular motions. Use straight motions whether you're washing, polishing or waxing - front to back along the car. This creates less opportunity for swirls.
Don't rush it. You can't get a mirror shine without having a flat surface - it's all in the prep.
Take your watch and/or any rings off.
DO NOT be tempted to pick up any cloth/sponge/mitt/clay bar off the floor using the 5-second rule. You might get away with it. Chances are very high that you won't.
When polishing, start off with the LEAST aggressive pads or polish and work up if they're not getting results.
Finally, do it if you have the time and want to put in the effort. For me, when i first started I had a new build house with a tiny garden that required no maintenance. These days, we have an old house where most of my weekends are involved with fixing something, painitng something, mowing something etc.
I simply don't have the time to devote to cleaning cars 'properly' that often. now i might do a pre-winter and post winter deep clean/polish/wax, but certainly no more often than that.
Here are some of mine over the years. Only the TT was new, and that I cleaned properly from day one...
TTC
TT and the wife's Golf
Golf
Mini
Swirls:
Swirls (mostly) gone: