Did the swiss cheese car have a roof in as bad a shape? Let me splain why everyone says to flush a car with a roof like this one.
I am sure you know how a roof is put together on one of these. Maybe you aren't thinking about it, so let me remind you. First, there's the inner roof skin. Then there are many reinforcing braces spot welded to that. Finally, the outer roof skin. That's a three layer sammich. I bet that roof has rust between the braces and outer skin, the braces and the inner skin, all the way down the sail panels, into the trunk (he's just not found it yet), into the rear quarters, all the way down the A pillars, and even into the cowl area and into the front fenders. That car is hiding a LOT more rust than meets the eye. I ga-roan-tee.
