Respraying an entire car requires skill, quality tools and more than anything - time. A shed load of it.
Your car looks fantastic, with a full detail and a resprayed front bumper, it'll be as near to perfect as any car will be. Just enjoy it. Or at least think about the other things you could spend £1400 that would bring so much more to the car.
You'd be risking so much. £1400 for a respray on a car is simply not going to cut it. And by the time you've found out it doesn't cut it, your lovely factory finish is gone forever, and you'll be chasing some one man band to restore the original paintwork of your car, which will never happen.
Small businesses have comparatively large overheads for the amount of money they bring in. They can't afford to redo a car 3 times if it's not right, and even the most skilled painter with all the patience in the world won't get something right when stripping down and respraying an entire car, so you'll just be fobbed off instead.
It simply isn't worth it. It isn't worth the money. It isn't worth the risk. And it won't bring you the type of workmanship and finish you crave. Spend the money on a BBK and a full correctional detail, or a carbon airbox if you want to bring a new angle to the car.