If you look real close, you will notice there was no seam sealer on the bottom side either (there was on the interior).Wow that was a solid bottom, hard to believe they didn't prime it.
You can see the small amount near the rear and some darker (almost brownish color) on the front frame rails.
The frame rails look like 1966...literally (except for a few dents).
If I recall the procedure correctly, it seems that maybe the front rails were hand sprayed and the thinking is the jets on the automatic sprayers for the bottom may have clogged or ran out of paint so Ford just kept the line moving. That's the theory from Concours , again if I'm remembering correctly. I also think that it was determined that the red oxide on the rear frame rails may have been from the body primer over spray.
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