seems a worthy product to invest in! i use provalet wheel cleaner it smells amazing! i only bought a small 500ml bottle to try out but its worth investing a 5l bottle tbh.
Andy go on youtube theres a great meguiars video, I clay'd the gt a few months back with the megs kit, its a soft clay bar and comes with a lube so it doesnt damage the paint work, its also great for touching up inbetween washes and polishing and waxing.
[ame="http://www.youtube.com/watch?v=yfEfLGL59GI"]‪How to Clay Bar‬‏ - YouTube[/ame]
(ignore the **** american car )
http://www.theultimatefinish.co.uk/m...se&variant=841
(good all rounder kit)
http://www.theultimatefinish.co.uk/d...ing-cloth.aspx
(nice microfibre to wipe it all over with after)