I found some photos of the flairs that I did on the back of my S3 DHC. This body was hit in the back and a S4 tails section had been grafted on, the back was mostly attached with "Marglass" and a little fiberglass cloth. I was going to leave the back alone but I just couldn't look at the half round arch of the S3 blended into the square arch of the S4 rear section.
These flairs were eyeballed on the shape. Posterboard and masking tape were used to form up the new arches. I didn't get them "spot on" but it was a learning experiance and now I can put the originals back on someday, maybe.
looks like a stack of 4 or 5 dashboards in the convertable storage tray.