Find a bodyshop near you that's one, got a good reputation, two, got one of those cameras that takes loads of photos of the cars colour (over time colour changes slightly and getting colour matches is impossible) and sends the pics to a computer which then finds a colour match paint mix and a paint mix that matches the car perfectly can be made, three, got a drive in paint booth and oven to cure the paint. I got my paint correction done at a very good rate as a returning customer.