@MikeC78. You're wrong, actually.^
I say that because on my own car there's a medley of different paint everywhere.. The whole drivers side is a re paint from an accident that happened prior to me owning the car, the hood and right fender I picked from the junkjard and are now restored, the passenger side doors and rear quarter panel are the original paint and swirl free.. The trunklid is original and has the best looking paint on the whole car, but I cannot get that last 10% corrected no matter what.
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I've tried Ultimate Compound, M105, D300 w/Microfiber cutting pads and Xtra Cut Microfiber pads, I even let AGOatemywallet have at it @TNOG w/M100 and the MT300 turned all the way up to 7500 OPM on a foam cutting pad and it still couldn't correct that last 10%. I knew it wouldn't because I had already tried a bunch of times. Lol.
Even he concluded, "man you got some hard ass paint"!
Back when I did that bit on my hood, I also did half my trunk with exceptional results that actually lasted a whole lot longer than the hood after I sealed it. I might just try that again because it looked perfect.
It may not be permanent, but last time I did it it lasted a good long time on my trunklid. I know this because I could see the difference between the tapeline in the middle of my trunk.
Btw it's not swirls that remain on the paint, it's more like random faint rids that appear impossible to get to. It's hard to explain the remaining defects.