the same color as the exterior body color. As an example, saw a really nice 70-442 with the under body in the same gorgeous matching paint as the exterior body. Did 70-442's come this way as new from the factory or was the under body a semi gloss or flat black (I think not, just curious).

 

the only car i have seen that was painted all over was my 69 beaumont.i figured it was a canadian thing.

 

Both AMC and Mopar routinely painted the under sides of their cars the same color as the body. There may be others as well but Olds was certainly not one of them - at least in the late 60's and early 70's.. They were all black underneath

 

My ‘71 underside is red oxide primer, with undercoating, which I believe was dealer installed. Framingham car..

 

This is called "over-restoring" and is quite common today. Oldsmobile did not paint the underside body color, at least not intentionally. There is likely overspray. It won't be pretty or shiny.

 

That's cool. I didn't know that.

I thought it was a "trailer queen" thing, or a sign of "over-restoration" like Joe said.

 

It may be an over restored thing for most cars but not AMC and Mopar. I have a 73 Javelin in Trans Am red that is just as red underneath as it is on top. Not as shiney but just as red. I have also had multiple other AMC cars from that era and all were body color as well.

 

I think most unibody cars had painted undersides, where as the body on frame gm cars were black.

 

According to an "old" friend who worked at Fisher Body in Lansing from 49 thru 84 .
After the bodies were welded together , they were dipped in a huge vat of red primer.
They were then sanded "where it shows" and then went to the paint booths .

He told me about one time , there was a lengthy strike . And sheetmetal parts just sat for several months and got rusty . He said that when the strike was finally off and production resumed . The rusty parts were put in the jigs and were welded into bodies .

He also told me that when he started there , that everything had to be " just so " . Because " they hated to have warranty claims " .
By 1984 , when he retired , " anything goes ".

 

Did the factory sprayed undercoating or that's the dealers job?

 

No , the "undercoating" was done at the dealership . I know , I used to do it .

 

Chrysler only painted body color up to fire wall underside was left in primer
they saved money that way
Alain

 

Not an expert on Mopars but if you watch the "Graveyard Carz shows, they painted everything body color. I know that just because they do it doesn't make it "correct" I suppose but given the level of restorations they do I would sure believe it to be correct.

 

painted floor underneath would be over restored
Alain

 

my 70 Cutlass Supreme was gray primer with a moderate coat of Sherwood Green on most of the undercarriage and the int floors before stripping it. It was built in Linden NJ and also had 2 build sheets which I"m happy about

 

It would seem the Lansing cars were black underneath, but the other plants varied in the painting process. My 71 Supreme was built in Arlington, and it is red oxide primer for lack of a better description. It isn't flat as you would expect but more of a semi gloss.

 

You can see the green on the int and ext floors. I undercoated the floors in the 80's so that some of what you see. I'm sure my mother is gonna love being on the net after going 84yrs under the radar, LOL