GOODMARK FENDER BLACK COATING ON / OFF ?

[mickey]

Hi Folks,

 Should i strip away the black coating  from the new goodmark fender or lightly sand it, and then apply EPOXY PRIMER TO Fender ? The rest of car was taken down to bare metal then epoxy primer applied. 
 I tryed paint thinner on a small test area on the goodmark fender, this black coating is hard to remove. Want to do this right the first time.
                                                     ANY SUGGESTIONS APPRICIATED THXS

[mopardave]

you do not have to, just like new OE metal panels of today you just scuff,clean and prime, but there is some that do no beleive in . this is a corrosive resistant primer. just depends on what or who you want to listen to.

[bandit67]

  Mickey, I posted this same question on another site awhile back and this is what I learned, DO NOT REMOVE THE E COATINGS. It is great stuff and companies have spent much in getting that process done. SOME advised me NOT to sand it at all , just shoot primer over it . Some said they believe in scuffing the surface abit for better adhedsion.  Since I was replacing a fender on a truck for my lady friends son, who I beleive would wreck the truch again,  I shot base coat staight over it.  Looked as good as the rest of the truck and I am keeping a check on it to watch for degradations.  I think for one of my restos, I would primer , block and  final coat right over the e coat....IMO ....J

[moper]

I run an abrasive scrubby over it. I dont want any issues down the road, and I've seen issues on other cars/products after leaving it intact. I think it depends on the coating tho too. I havent used the Goodmark stuff yet. But for my peace of mind, I strip it off the outside of the skin.

[Tropicalcats]

I would not remove the E- coating on the fender. I am going to have my whole car e-coated once it is totally stripped down. It is what they use on cars of today.

[mickey]

Thanks for the repleys so far, they make our decisions so much easier, like i said, like to do it right the first time.
I did call goodmark, they also recommened that I just scuff the fender.
If i have any issues down the road well it will only be just one fender to deal with.
                                                                       

[Wang]

I have left it on with several that I have worked with ,,, no problems to mention. 

[SilverChally]

I scuffed and epoxied them, inside and out.  I stripped the goodmark quarters though because I was doing a good bit of work to them.... it was visible to the eye that there were imperfections.  Fenders looked alot better except some edges.