3D One is still my polish of choice.
Great luck using it with Buff and Shine Uro-Fiber pads for a wide range of defects, but seems to excel in the moderately heavy to medium amounts. The good news is that it usually finishes down nice enough to go to protection after. I have had that combo leave it's share of marring too, so it's good to have som finer foam pads in the event you need to refine.
For foam pads I've been leaning toward the Lake Country CCS. Just the original like, not the HDO/SDO. I like the green, blue, and black, but you'd probably just need the blue or back for finer finishing.
In the past couple of years I haven't needed anything finer than 3D One, but in the event I do, I have 3D AAT502 on hand. (just like I keep ACA500 around for heavy corrections).
I stay with One because it doesn't dust, and doesn't stain trim.
If not over used (apply too much polish to pad), and not overheated, it's super easy to remove. (Use too much and you'll be wiping forever)
I also love that it doesn't stick to the paint. I used to be really good at using Meguiar's M205 and Ultimate Polish, but when I try lately, they leave deposits that cement themselves to the paint.
I couldn't telly you how many cars I've corrected, "one stepped", and finished with 3D One. Just one of the tools for the day job, and I use it for private clients as well.