Want to make sure all the panels match? When painting, loosely assemble the body before spraying the last couple coats of base coat. First, make sure there is full coverage in the jams, carefully put the panels together, spray the final couple coats, and then take it back apart to clear it. I know all the paint reps say it will match, and a lot of times it does. But with the level some cars need to be finished at, 3 extra hours is a very cheap insurance policy.