Would be pretty unusual to have orange peel that bad on the top of that car. Should have been sanded out or flowed out in the reflow oven. Maybe bad quality control that hour or ovens weren’t working right?
Color System: The bodies were sequenced to "batch-paint" by color as much as the build schedule allowed, to minimize the waste of thinner required to clear paint guns between colors. The interior was masked off, the body exterior was tacked-off, and it then entered the main color booth, where it got three coats of acrylic lacquer, sprayed automatically with vertical and horizontal reciprocating spray guns, with a 3-minute "flash" between coats, followed by a 10-minute bake at 200F to "skin" the surface prior to sanding. In the next stage, any surface defects were power- and hand-wet-sanded with mineral spirits, then wiped off prior to entering the final "reflow" oven. This bake lasted 30 minutes at 275F, where the lacquer surface softened and "re-flowed" to a uniform gloss.
People can believe what they want. I am done discussing. I know what I know based on what I have seen for 67 and 68. Can’t say with as much certainty for 69. Over and out.