I used a guy called Ed at Divine Detail on my wife's Range Rover. He will quite happily use Gtechniq, but recommended I go for Opti coat pro 2.0 as it prevents bird poo eating into the paintwork.
Look at his website
http://www.divinedetail.co.uk - he is, from memory, somewhere near Coulsdon, which is quite close to Orpington. Helpful chap too
