The closest to original we can get for solid colored paints is by using Glasurit 22 Line. It's a 2K (2 Komponent) single stage paint, and it has a very long shelf life, but only in its natural form. If you mix hardener into it it'll last about a week. However, as MBPaul stated, California made it illegal to use anything but water based paints. So if you want a good paint job you'll have to have the car painted in Nevada or Mexico. The thing about the Glasurit 22 Line is that it'll outlast and out shine any new modern paint, but finding someone that knows or is willing to work with single stage paint is another challenge.