Depends on job and price point.
My answer is yes AND no!
I do ALOT of boats, RVs motorcycles, and yachts with a few vehicles thrown in.
I offer package deals. With that said I wouldn't be productive with a buffer out on EVERY job.
If I do break them out it is due to oxidation most of the time...
When doing an aluminum RV becareful to NOT scrub hard on black marks or around trim as you can leave a scratch/indention in the soft aluminum. I had an employee once use a nailbrush around the trim leaving indentions all the way around each trim.
As mentioned above there are several products...