Powder coating, like paint, will vary in its properties.
I ran into it recently on a detail with paint correction on a fully powder coated buggy.
The owner told me he thought it was painted, so I was baffled when I started to work on it and it behaved nothing like any paint I had ever worked on before.
I would say it was most like the famous "impossible" BMW black...it is so soft, even a microfiber can mar it, but it almost "stretches" so trying to removing damage is very difficult.
I tested out MANY products, but eventually settled on M105 and a yellow Meguiar's polishing pad via rotary. I then followed that with M86 via yellow and the FLEX, followed by 3M ultrafina with a Meguiar's black SOLO finishing pad.
I would say it was 95% flawless, with a few random "tracers" left in there.
Owner couldn't see them, but I could.
Here's some pics...to get an idea, the whole detail took me about 14 hours.