No, I never said it was a TVR?
It's a special paint which looks different silvers from different angles, from blue-silver to gold-silver and to green-silver and hence doing a single panel like a door will make it look stupid and not be a match. You can't fade it in on flat areas and can only use creases of the body work, which is what he did on the bumper. Accordingly, it would require most of the whole side of the body preparing and then spraying.
I didn't estimate £1000, the bloke doing the job for me estimated it....and considering that's his career, I will take his word for it, especially since the work he did for me was £100 cheaper than my next best prices.