Trying to do a proper job outdoors in winter UK is almost certainly doomed and unless you already own polishers and supplies then it's not going to be cheap either. As mentioned earlier i did my S BUT the pearl paintwork is in excellent condition (ex showroom model) and I wasn't expecting perfection. After washing I clayed any 'bits' and marks and then did a gentle claying and rinsing of each panel. With the cheap (claimed to be ceramic but who knows 10 bottles for £20) It took my aged bones and backache 2 days and a one and a half bottles to coat and buff panel by panel - everywhere but the windscreen. The product has quite good short term reviews but doesnlt last more than a month or two .. so 2 weeks later when it should have oxidised fully I washed car throughly and redit it- no need to go silly with prep this time and it took me half a day to get it cleaned and a second coat. Any dirt had easily rinsed off. I plan to recoat higher risk panels after each wash which with wales winter mud and rain will likely be 4 weeks plus between washes but I'll gadually get around the car every 2-3 mths topping it up - it's actually quicker than washing, polishing, waiting for the polish to haze and then buffing. Youngun's could probably do a car in 2-3 hrs. For all that the end result was visually excellent despite the economy.