The closest I have come to having to work on a problem that was severe was some light cat scratches on my daughters car.
A Meguiar's polishing pad and some Meguiar's #83, DACP took care of those. It did take some time and multiple passes. I ran the PC at 5 and 6. I did go over the area where I used the DACP with Meg's #9 afterwards, but I don't think it was absolutely necessary. I think I could have gone right from DACP to a wax.
FWIW, I tried the #9 first and it wasn't getting the job done.
Depending on the severity of the marring a swirl remover might do the trick, but I doubt that SSR1 will be aggressive enough. You already have it so it would be woth a try before you buy something else. It might just take a little longer. If you try a section, you will know fairly quickly if you are getting the results you are looking for.
That's if he left swirls. If he actually burned the paint, you most likely have a real problem.
Charles