I'd use something with more cut to remove 3K sanding scratches and I've never had good luck with the TriZact (but then I didn't try too hard either). IIRC, Bence found the TriZact to be full of fillers.
I'd leave it alone if I were you, IMO you might open a can of worms and they'd say it's all your fault. There are worse things than orange peel and even contamination in the paint. At some point it's time to say "enough" and just move on (I finally said that on my S8 and IMO its repairs from the deer incident really suck, but hey, life is short).