Have never seen anything like this but I have seen more sloppy stripe work in the cowl area and on the firewall. There is one photo in my 1969 Camaro fact book that shows a firewall on a rally green car that is almost all white from overspray. Looks very bad, but it's original! My buddy bought this car new and the photos were taken when the car was new. Some of the production cars were done poorly and others were done nice. Remember, 55 cars an hour two shifts a day. That is why we are working on a judging manual so all will build and restore cars to the nicer built production cars........not the bad ones.