This does not answer John's question, but there was an original unrestored 100 ice blue with white cove car at the Vermont Conclave. I was surprised to see that the paint line did not extend straight into the front wheel well forward of the fender flash. Instead, it had a sharp curve downward into the wheel well terminating a few inches below a straight extension of the swage line. I wish I had photographed it, but did not. I have seen other cars done this way, but most 100's use a straight extension of the swage line into the wheel opening.
I would guess that the cove paint should include the edges of the wheel arches, except for the 6 cylinder cars where the cove does not quite reach the front wheel arch. But I don't know for sure.
Bill S
NM