Will topcoat stick to EDP coating........

[bandit67]

Guys, I got front and rear valence panels I am ready to put on. The car is to be a daily driver and was shoddly painted with a flat black many , many years ago and I am leaving that patina look as is. But feel i need to put some top coat on these EDP coated repops. Will the topcoat stick to scuffed up edp or has it GOT to be primered first....thanks....

 

[zyzzyx]

If it is in fact, EDP coating, you must prime it with an epoxy or 2k primer. The EDP coating has no barrier properties!

 

[hunt2elk]

I always scuff and epoxy prime first. Why take a chance I figure.

 

[Sahara]

The previous two guys are correct.

 

[Bighouse]

If your going to epoxy anyway, at least remove the questionable EDP from the outsides of the panel.

 

[bandit67]

Got it, thanks. I do have some epoxy primer left, but I thought the edp was a great moisture barrier, so the part doesn't rust just sitting.

 

[WileE]

The previous two guys are correct.

That makes 3 guys correct !

 

[mopar4don]

I would remove the edp coating.
I can say that my quarters had slight surface rust piping through in a few areas. Granted they were in my garage exposed to humidity but still who would think that would happen.
I am not reliing on a coating designed to resist rust for the short term. And risk the time and money spent for paint

 

[Bighouse]

I would remove the edp coating.
I can say that my quarters had slight surface rust piping through in a few areas. Granted they were in my garage exposed to humidity but still who would think that would happen.
I am not reliing on a coating designed to resist rust for the short term. And risk the time and money spent for paint

Heres a spot on my new quarter panel.

 

[Canadian1968]

Sand the E-coat with 320. Blemishes like the one in the picture, feather out. Etch any bare metal , seal and paint done.

No need for epoxy.

Have been doing this at the shop I work at for over 10 years. We offer a lifetime warranty on all new parts. Honestly can't think of any come back for anything to do with E-coat failure. There are about 1000+ cars threw the shop each year.