Coating on AMD panles

[cheno2]

I'm in the process of installing lower 1/4 patch panels, trunk extensions and one 1/4 skin. My questions is do I need to recoat the BACK side of these panels before installing? Obviously the welds will need to be coated but is the factory coating ok since it will be to the inside? My trunk extensions seem to have a heavier coating then the 1/4 panels? I have been using weld thru primer on the joints. Thanks in advance.

 

[bigblock]

Thats a good question.I would like to hear some answers on the subject too.

 

[hunt2elk]

The e-coat on the AMD stuff seems to be pretty good stuff. I was told if the black coating doesn't wipe off with lacquer thinner, you can scuff and prime over it with no worries. This is what I am doing on the back sides of the fenders and quarters. I am using a DA to remove the coating on the exterior surfaces just to be safe.

 

[Pistol Pete]

The e-coat on the AMD stuff seems to be pretty good stuff. I was told if the black coating doesn't wipe off with lacquer thinner, you can scuff and prime over it with no worries. This is what I am doing on the back sides of the fenders and quarters. I am using a DA to remove the coating on the exterior surfaces just to be safe.

I concur. Scuff sand the interior, strip the exterior.

 

[pturner]

i had the same concern, so i called AMD and talked to Aaron. he said the E coat is an electrostatic paint coating that is applied at the factory after the metal is formed and cleaned. he said that most shops just scuff the black paint with a scotch brite pad before priming with epoxy primer. No need to get it all off.
i am actually rubbing them with some 220 paper before epoxy.
BUT do what you feel comfortable with.
Pat in Tennessee
68 Roadrunner (metalwork continuing as we speak)

 

[Inspector71]

What's the difference between epoxy primer and other primers?

 

[RGAZ]

The black electrocoat is the exact same material that modern cars are primed in. It is usually epoxy-based and has an undercoating of iron phosphate or zinc phosphate to resist corrosion. Keep it on there. If it is exposed to UV it will chaulk and degrade fast, so topcoat it right away if it is an exterior piece.

Randy

 

[Inspector71]

RGAZ: Can the black coating be painted over or does it have to be scuffed up first. Thanks for this thread. I've been wondering this myself.

 

[Propwash]

Scuff/sand it first........till there is no shine/reflection left to it.

 

[SilverTBM]

I work with E-coated parts in a daily basis. Its is a good base coat as long as it is applied properly. Its is a pretty thick coating @ .0015"-.0020" thick. It doesn't flake like power coat and can be sanded primed and painted.