What do you think to Onyx Rob? I've been thinking of getting some for a while. I'd be interested what it's like on a black Renault paint. If it's any good I might pick some up for summer. I used Dodo Juice Purple Haze last year, but I found it dumbed down the flake in the paint quite a lot.
Onyx is really good mate it goes on easy and it's easy to remove lasts a decent amount of time as well. I no they do more expensive waxes but I dont think I could justify what extra you would get for the money.