1969 Roadrunner Undercarriage

1969 beep beep · Oct 2, 2017

I am trying to decide what to do with my undercarriage. My car originally had undercoating from the factory. I spend hours removing this but I am not sure if I should reapply it. The car is currently on a rotisserie and I am completely redoing everything.

This is not going to be a daily driver but more of a weekend cruiser. Should I stick with the factory undercoating or paint the underside? If I go the paint route I would like to keep the primer with over spray look.

Did all 69 Roadrunners come with grey primer? My car was from the St Louis plant

4mulas · Oct 2, 2017

Mine has a grey primer underbelly with overspray. This is the way they came. Mine also had, either done at the factory, but I think done at the dealer as there was no note on the build sheet saying factory done, undercoating in the wheel wells and a portion of the underside of the car.

I opted to undercoat the wheel wells thoroughly as I do drive my car 1000-1500 miles per year and did not want a rock to ping up from the underside and spider crack the paint from the bottom side of the fender or. Anything like that.

Good luck with your choice!

69 GTX · Oct 2, 2017

I undercoated mine. As I figured it would be easier to repair/match if touchup was needed. Plus it's a better sound deadener.

moparnation74 · Oct 2, 2017

All 69's had the grey dip primer..... personally, I go with what the car originally had. If it came with full undercoat then it gets that....also keep in mind even with full undercoat there are still areas that did not get coverage and the dip primer is exposed....

In the end do what you want.....the undercoating can be applied later.....

Grady Cain · Oct 2, 2017

My Challenger is a non-undercoat car according to the build sheet but the dealer sprayed the front and rear wheel wells prior to delivery because of our location in the North. I recreated that primer look with the body-color overspray as I am doing an assembly line correct restoration. Like moparnation74 says, "Do what you want..." Resto Rick sells the grey dip primer which is a very accurate representation of the original...

Ranger16 · Oct 2, 2017

Mine is undercoated and listed as such on the window sticker as a J55 code for $16, which leads me to believe it came that way from the factory.

eldubb440 · Oct 2, 2017

painting the underside is a TON more labor.......its a much bigger pain in the *** than painting the topside; even though it is rarely seen and doesn't need to be perfect...... Dusting paint over primer may be slightly more forgiving, but it hides nothing; same as full paint......undercoat hides a ton and is very forgiving.........personally, I am a glutton for punishment. Full paint or paint/primer is way nicer....... you get out what you put in

eldubb440 · Oct 2, 2017

mine had undercoat, and they got it on everything.........what a mess

1969 beep beep · Oct 3, 2017

Yes its a hard decision but I still got some time to decide.

If I keep the car on the rotisserie to paint the bottom, should I then put the car on casters to align all the panels? Then paint the car with the casters or back on the rotisserie? What are the best steps? I am learning as I go.

eldubb440 · Oct 3, 2017

1969 beep beep said:
Yes its a hard decision but I still got some time to decide.

If I keep the car on the rotisserie to paint the bottom, should I then put the car on casters to align all the panels? Then paint the car with the casters or back on the rotisserie? What are the best steps? I am learning as I go.

if possible, I align all my panels and do all my bodywork while the car is still assembled..... if door hinges need addressed, that is first........then everything painted in pieces and reassembled...... colors like silvers and golds can be tricky and slightly alter the paint plans

eldubb440 · Oct 3, 2017

1969 beep beep said:
Yes its a hard decision but I still got some time to decide.

If I keep the car on the rotisserie to paint the bottom, should I then put the car on casters to align all the panels? Then paint the car with the casters or back on the rotisserie? What are the best steps? I am learning as I go.

i misread, you are already on a rotisserie ....... I have a set of steel horses, I lower the car enough to get some support in the middle and hang the doors; The castors may work fine, but the key is getting the doors parallel to the rocker.Next I mock up the front and do all my body work (at least where all the panels meet); then break it back down for paint....... how it fits before paint is how it fits after paint, it's the perfect example of measure twice, cut once

eldubb440 · Oct 3, 2017

this is my preferred way as in post 10....... all the pita work done and fit prior to rotisserie

eldubb440 · Oct 3, 2017

mockup after rotisserie.......post 11....... notice my steel horses

69roadr · Oct 3, 2017

I've got Factory undercoating under my car there is not a speck of rust

1969 Roadrunner Undercarriage

1969 beep beep

Well-Known Member

4mulas

Well-Known Member

69 GTX

FBBO Gold Member

moparnation74

Well-Known Member

Grady Cain

Well-Known Member

Ranger16

Well-Known Member

eldubb440

more miracles than Jesus

eldubb440

more miracles than Jesus

1969 beep beep

Well-Known Member

eldubb440

more miracles than Jesus

eldubb440

more miracles than Jesus

eldubb440

more miracles than Jesus

eldubb440

more miracles than Jesus

69roadr

Well-Known Member

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