I just purchased the thule roof rack system. Before I install them, should I wax my roof?

 

Personally I would. I wax what ever I can when I remove a part or before I put a new part on. That way you won't have to remove the part/s when you wax the car next time to make it match. Not only that, but it is good for the paint too. And Yes, everyone tells me I am to picky about my vehicles, I have been known to wax under the wheel wells.