I think of   "polish" as a range of very mild abrasives, finer than a
"rubbing" compound but not quite as fine as a "rouge."  Polishes, and
waxes containing them, can be used carefully for removing swirl marks,
oxidization, leaf/bug-poop staining, etc.    Probably not as big a need
-- and more of a risk, especially if you're heavyhanded about it --
in this age of clearcoat finishes.    If your paint is in good shape,
wax a few times a year should be able to keep it that way.

The websites of major car-wax vendors often have useful tips on this
sort of thing, spun toward promoting use of a number of their products,
of course.

Cheers,
--Joe

You could always try Mr. Kesuke Miyagi's website.

Maybe you'd like to try the Cadillac Blue Coral Polish I found on my
uncles basement. He bought it for his 58 Caddy back in 58, still got
about a 1/2 inch of wax in the can..and its blue too!

Harryface