Body Black coating on new body parts
Flyfisher
Jeeper
- Posts
- 4
- Thanks
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- Location
- southeast
- Vehicle(s)
- 1976 CJ7, 304 headers, 4 barrel, RV cam, automatic, quadratrac, featuring a generous amount of rust
Hello all! I am new to the group, enjoying the site very much so far. I'm doing deep repairs on a rusty old 1976 CJ7 , and recently bought a new hardtop hatch - window frame for the project. I was confused about exactly how I should paint the part as it had a very nice, slick black coating I am not familiar with. I don't want to mess it up.
Now, I have been "blowing" automotive paint a LONG time, but primarily on airplanes in the past, only a few cars. The black coating is clearly intentional, not a mill scale that should be cleaned off before painting like what you typically see on 4130 steel. I was unsure about how to best deal with it. The vendor who sold me the part was unable to provide good information, said factory had not gotten back to them. Lacking better data I went to the web.
IN CASE YOU are faced with the same questions, this information might be helpful to you. Copied from:
http://www.nationalrestorationparts.com/body-parts/what-is-edp-coating-on-restoration-sheet-metal/
"Black Coating on most restoration sheet metal, What is it?
It’s called EDP, which stands for Electro Deposit Primer and it makes an excellent primer under your paint job. As you probably know, factory paint back in the 60’s and 70’s was usually just sprayed onto the surfaces that could be reached by a spray gun. But this left may blind areas behind braces, etc., completely bare of any paint protection. Hence, many cars rested within a few years. But EDP coating is applied electrically, almost like a plating process.
This excellent rust-resistant coating reaches every nook and cranny, for unparalleled corrosion resistance. The only surface preparation required is a light scuffing of the surface for better paint adhesion. No stripping is necessary. The panel is protected from rust as long as the EDP coating remains under your paint."
So there you go!
Now, I have been "blowing" automotive paint a LONG time, but primarily on airplanes in the past, only a few cars. The black coating is clearly intentional, not a mill scale that should be cleaned off before painting like what you typically see on 4130 steel. I was unsure about how to best deal with it. The vendor who sold me the part was unable to provide good information, said factory had not gotten back to them. Lacking better data I went to the web.
IN CASE YOU are faced with the same questions, this information might be helpful to you. Copied from:
http://www.nationalrestorationparts.com/body-parts/what-is-edp-coating-on-restoration-sheet-metal/
"Black Coating on most restoration sheet metal, What is it?
It’s called EDP, which stands for Electro Deposit Primer and it makes an excellent primer under your paint job. As you probably know, factory paint back in the 60’s and 70’s was usually just sprayed onto the surfaces that could be reached by a spray gun. But this left may blind areas behind braces, etc., completely bare of any paint protection. Hence, many cars rested within a few years. But EDP coating is applied electrically, almost like a plating process.
This excellent rust-resistant coating reaches every nook and cranny, for unparalleled corrosion resistance. The only surface preparation required is a light scuffing of the surface for better paint adhesion. No stripping is necessary. The panel is protected from rust as long as the EDP coating remains under your paint."
So there you go!
