as a collision repair (body shop) owner/operator I take a bit of offense to the generalization. Now unlike some shops, we don't buff regularly besides the occasional denibbing/buffing. How are we supposed to repair vehicles without touching the paint?
Didn't mean to rustle any jimmies...
I guess it's just what I have noticed through the lens of my friend who details professionally. Not saying you don't know how to do paint correction (AFTER the paint), but generally detailers are better at correcting paint than body shops or dealerships. He and I have both seen some horrendous stuff after an expensive bill and a "professional" detailing job from a dealer or after body work.
And I guess a personal experience has left my arse a bit chapped. I spent about 5-6 hours on my brother's paint on his Silverado when he first got it. When he had to have his door replaced, they took the liberty of polishing the entire truck with something too abrasive and brought the swirls right back. The same thing happened with my friend's 3 series (the detailer) who specifically told them to not touch the paint.
Not a personal knock on you at all, I'm just letting you know what I base my opinion on. Your shop may be an exception but I would say a majority of body shops are pretty bad at paint correction. While they are masterminds at body panel replacement, dent removal, freshly painting a panel, etc., I would say a pro detailer is better after the paint has been laid down.
Take it FWIW.