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On a 1969 , where the wheel wells sprayed with undercoating from the factory? I'm in the process of trying to remove all the undercoating from the bottom of my car and it has turned into quit a nightmare. I don't want to do the wheel wells if I don't need to. Thanks in advance
From: At my Bar drinking and wrenching in Lafayette Colorado
There was no need to "undercoat" a fiberglass car. The factory didn't "undercoat" cars. The frame was painted by itself, and so was the bottom of the body and firewall, along with the insides of the wheel wells. Most of the underbody fiberglass panels were actually left in their bare "natural" state as a grayish/black color. The painted frame and the painted body were then united. The areas that did receive paint were done in a 60-degree satin black paint - not "undercoat." "Undercoating" was done by dealers and shops hired by the dealers to do "undercoating." Your AIM shows how the underside of the body was painted. The insides/undersides of the wheel wells received a satin black finish, but it was not as "coarse" as what we regard as "undercoat" or "bedliner."
First a note about the frame... the frame was painted with very cheap black paint. It was painted by DIPPING it in a big vat. And, the frame was upside down when it came out of the vat so runs and sags are running the wrong direction when the frame is right side-up. I believe the frames were stored stacked up outdoors so often weren't 'nice' when the build started.
What we see as 'undercoating' is what Chevrolet called 'sound deadening'. It was sprayed very sparingly on the rear surface of the wheel wells. It's often seen sagging off the bottom edge of the wheel wells rear panel.
Black-out (as Chevrolet referred to it) was sparingly sprayed on the upper parts of the engine compartment inner fenders, the upper part of the firewall, the wiper bay and the forward side of the windshield frame. No attempt to paint the underside of the body was made. Any black/overspray was typically the result of the 'black-out'.
The purpose of all this was that these parts look presentable when a perspective buyer looked over the car dealer.
First a note about the frame... the frame was painted with very cheap black paint. It was painted by DIPPING it in a big vat. And, the frame was upside down when it came out of the vat so runs and sags are running the wrong direction when the frame is right side-up. I believe the frames were stored stacked up outdoors so often weren't 'nice' when the build started.
What we see as 'undercoating' is what Chevrolet called 'sound deadening'. It was sprayed very sparingly on the rear surface of the wheel wells. It's often seen sagging off the bottom edge of the wheel wells rear panel.
Black-out (as Chevrolet referred to it) was sparingly spayed on the upper parts of the engine compartment inner fenders, the upper part of the firewall, the wiper bay and the forward side of the windshield frame. No attempt to paint the underside of the body was made. Any black/overspray was typically the result of the 'black-out'.
The purpose of all this was that these parts look presentable when a perspective buyer looked over the car dealer.
Regards
This is the answer that you were looking for.
There was an undercoating of sorts applied (very sparingly) to the wheel wells…. GM referred to it as “deadener” and was listed under part number 9981300. A blackout paint was also applied (very inconsistently) to cover the body color overspray that invariably ended up in the wheel wells, engine compartment and wiper bay. This was purely cosmetic in nature.
I’m actually using the same paint in the fender wells that I used in the engine bay, the firewall,
rear storage compartment and the wiper tray (windshield frame is POR15).
SEM Trim Black.
It’s an automotive paint and is good on plastic or fiberglass.
I get it through Eastwood and it’s available in quart cans or rattle cans.
It’s also available from Amazon and Summit Racing.
For some reason Amazon states it is unlawful for them to ship it to my address.
What we see as 'undercoating' is what Chevrolet called 'sound deadening'. It was sprayed very sparingly on the rear surface of the wheel wells. It's often seen sagging off the bottom edge of the wheel wells rear panel.
Originally Posted by Rowdy Rat
This is the answer that you were looking for.
There was an undercoating of sorts applied (very sparingly) to the wheel wells…. GM referred to it as “deadener” and was listed under part number 9981300. A blackout paint was also applied (very inconsistently) to cover the body color overspray that invariably ended up in the wheel wells, engine compartment and wiper bay. This was purely cosmetic in nature.
Regards,
Stan Falenski
To tie it all together, yes, the wheel wells had a thick material sprayed on. It is heavy and bumpy and very much looks like what most of us would call undercoating. I learned somewhere over the decades that one of its purposes was to protect the fender tops from stone chips. Stones hitting the underside of the fenders can cause stars to appear in the topside paint.
Undercoating Dilemma
