I'm new to waxing/polishing etc., have always gone thru drive thru car washes but just got my dream truck and want to take better care of the exterior. Everything I've read emphasizes waxing in the garage or shade, but I have no way of getting my truck into my garage and don't have a shady spot to park it in. How crucial is this and can I effectively/safely wax in the sun? It's a new truck so the paint is new, I only plan to clay and wax art this point