Metering for ND Grad
Set your meter to spot. I posted images of a white Corvette in the California shun on another forum. The shot came out dull looking. I shoot with a Nikon, which offers Matrix metering. That's the usual solution because it compares your shot with a database of 30,000 images.
But it doesn't work correctly when an ND filter is thrown into the mix. The result I got was flat, as if the white paint had been in a dust storm.