Told you not to do it Jay! Best get someone like Tim come and give it a proper detail (correct any swirls etc), and finish it off with a nice wax. From then on give it a 2 bucket method wash one a fortnight (I know you wont do it weakly!) and top up the wax in a few months. Then after a year of that, get Tim to come back, asses the car and give it a good going over. At the end of the day, vs the running costs of an Aston, getting a pro come and keep it tip top once a year is more than worth the money!