Agree with above comments, get a layer of protection on your car; definitely worth it, and enhances the appearance too.
As well as providing protection against the elements, it'll also make it much easier to wash and maintain. A good (wax or sealant) coating will help to stop the dirt sticking to the paintwork so with a good washing technique, dirt is easier to remove from a well protected, slippery surface, so there's less risk of inflicting swirls during washing. Easier to dry the car too when it's well protected; rinsing with an open ended hose to 'sheet' the water off leaves very little water to mop up with a good quality drying towel.