- A 68 San Jose built car would have been painted on the bottom using jets mounted below the moving body from approx the firewall area rear ward prior to the application of the interior and exterior paint (in that order)
- The frame rails and forward (from the firewall area) reward was then sprayed by hand. Both applications were of a red oxide primer sealer (not the Rustoluem looking stuff) a red oxide colored epoxy primer/sealer which produced a smooth somewhat glossy finish not the flat finish we think of when we thing primer. The paint source for each of the applications came from a different source so the tone and tint of the two applications, firewall rearward and firewall forward often was different - either slightly or more noticable. Color varied during the production year. You car, if not restored or repainted, is the best place to find the original color. If that is no longer possible - if you post when the car was built we should be able to provide what other cars were painted with (color, tone and tint) from around the same time. Have pictures and a bag of samples I've cut from donor cars over the years with matching VIN's on each.
- On the main and rear floor area of the car the red oxide normally faded out just before the rear cross member leaving some bare steel or lightly oversprayed, just before the galvanized rear cross member.
- Over this (under the car) you would have sealers, body color overspray or direct application from painting the rear wheel wells and frame, rocker panels and so on during the exterior paint application.
- Over this there would be black overspray at the area at the bottom of the firewall (in wheel wells and back of engine compartment area onto the red oxide in those area
- Over this there would be black overspray or some (at logical locations) from the pinchweld black out process.
While your going through ll the effort - don't forget to address the 8 dolly marks on the bottom of the car and and a couple in the trunk at least where they will be possibly visible after the car is assembled. There are two more that can be seen in the interior but end up under the carpet.
For a general idea of the whole process I suggest you look at an article from CM that covers the 67 San Jose built cars. Its pretty close to what they did in 68 also
Hope this helps
https://www.docdroid.net/dNrBoiu/article-opensource-67sanjoseunder-19v6.pdf
