I see a lot of people on here use the megs but tbh i think there's a lot better products for the same money. The first thing i'd do is give it a going over with some as tardis to remove any tar, then give it a clay to smooth the paintwork, bilt hamber clay is good, nearly half the price of megs and you get about twice as much. Then it really depends on how much time you want to spend but for yourself who doesn't maybe want to get into a full detail then clean your car do a good kit consisting of car lack, collinite 476s, a couple of microfibres and a couple of applicators. The car lack prepares the paint well and the collinite 476s is a good reasonably priced wax which lasts for ages. Once you get your car to that stage then a good wash and dry technique will keep it looking pristine.