1970 914-6 Bottom Paint Question? Options

[racerbvd]

I got a big question on our 914-6, on the bottom, mine has been painted a different color (from the factory) and undercoated:confused:
My paint guy says that he finds no traces of Blue on the bottom and that the color & under coating appear to have been applied from the factory..
, (IMG:http://www.914world.com/bbs2/uploads_offsite/forums.pelicanparts.com-226-1320700084.1.jpg)
(IMG:http://www.914world.com/bbs2/uploads_offsite/forums.pelicanparts.com-226-1320700084.2.jpg)

(IMG:http://www.914world.com/bbs2/uploads_offsite/forums.pelicanparts.com-226-1320700085.3.jpg)
This is a Concours Restoration, so it has to be correct, so on one hand I'm thinking just Paint the bottom the matching Blue, but on the other hand, Porsche was also known to sometimes spray the bottoms with what ever was left in the Spray gun and I know of one collector who has a few 914-6s, like mine, both 70s and both OEM, yet one of his 1970s Six's has no coating; another '70 does:confused:
I need to figure this out ASAP as the car is ready for Paint..
(IMG:http://www.914world.com/bbs2/uploads_offsite/forums.pelicanparts.com-226-1320700085.4.jpg)

[1970 Neun vierzehn]

I have no hard core proof, but, I have always understood that what we typically refer to as "undercoating" was applied at the port-of-entry, or at the dealership. I would think this application would be more prevalent for Atlantic seaboard, Northeast, or Midwest bound autos.

As far as the bottom of the pan is concerned, I would also assume that the original body color would be what was to be expected. Though my 914 is a /4, with a build date of January 1970, the top and bottom of the pan were painted in the body color paint.

Since all 914 bodies originated from the Karmann plant in Osnabruck, I can't imagine /4s and /6s were painted differently.

The attached photo shows "undercoating" giving way to pale yellow (body color) paint, giving way to white (factory primer?), giving way to the rust repair.