Question - Any harm in a coating of car wax on my sticks during winter storage ? I've always used it on the guide inserts as I feel I get a little more distance, but never on the rod itself.

No problem.  Actually many builders suggest a coat of wax on the blanks.  (at least the shiny ones!)  

There is no problem with waxing your rod. It will help protect the blank from the banging around in the boat or transporting your rod. I personally apply two coat of wax on every rod I build and tell my customer to wax rod once a year.

Agree with others and also, if you need a real quick clean/shine, lemon pledge (has to be lemon pledge) furniture polish works good as well to give it quick polish without having to buff out like a car wax.

Eddie