If you buy your own paint, don't buy it from Autopaints in Birkenhead. Everytime I've used them they've f*cked up, and generally can't be arsed even colour matching.
I second that! Steer clear!
Heres the best place (if you have the cash)http://www.houseofkolor.co.uk/
I`m getting my astra done soon for £400, but for that iv`e got to strip all the interiour out, the bumpers off etc, windows out, bodykit off and already stripped the primer off and bought a new bonnet (don`t want to repair the old one which has rot under the lip)