Nothing wrong with waxing your paint.
(properly cured paint that is)
It sure seems to make my car easier to keep clean.
and it does seem to offer a little protection.
I have had paint jobs with no wax for over 3 yrs and still look great,
but waxing it sure wouldn't hurt anything.
And useing a good wax with polish in it will suprise you the
ground in dirt it will remove if it's been a while,
just like a clay bar will do too.