Guy. Take the day out and really enjoy the process, it is quite a long one! Once claybared I recommend "Meguairs paint cleaner" (Marked as stage 1). Once you have this done the paint is ready for bringing back up to lustre. Follow this up with a good polish - everyone has their favourite, mine is Autoglym Polish and to seal that loveliness in the final stage for me Is Meguairs Carnauba wax. Once this is all done with cup of tea in hand rub your finger along the paint and feel how smooth it is, and then step back and enjoy your work.
As they say the devil is in the detail and you can then go as mad as you want, autosolve to clean the chrome on the tail pipe, Mer bumper cleaner for all the plastic and vinyl (wiper covers, black plastic around the wing mirrors and grille), also pleanty of good wheel cleaner out there as well. Did I mention glass? The the inside, but thats another story!
Just enjoy it, you will smile after.