Another thing that I could never get a straight answer is.......if you look at a C4, it is really chopped up into sections. If you had a way of mixing the exact color over and over, would you really need a "Big Gun" to spray large areas??? The Clamshell is the only thing that bothers me it is a huge area...but the rest of the car is small touch up style areas with lots of breaks for masking off. If you are not changing colors and only restoring the paint, could you not paint section at a time???