[JerryMopar]

Hello all, I got a brand new fender for my truck, and I painted the sensitive parts of it with POR. I was then thinking of getting emoxy primer and praying it on over the POR. I figure this will be fine,as im not totally depending on the POR for protection. Anbody elese support this??

Jerry

[adtkart]

You should have just applied the epoxy to it. I don't know if the epoxy will stick to the other stuff. I understand that it takes some special coating on that, not regular paint. The epoxy would have provided as much protection as you should need, once it is top coated. If it is on the underside, it wouldn't even need top coating.

Aaron

[kenseth17]

Yeah, I would of personally just epoxied it. Epoxy doesn't seem to stick to the rust convertors, I never used por personally, as well as it does to metal. Being it is a brand new fender there would be no reason to use a rust convertor product anyways. I am not a big fan of them as many others, although have used them in inner panels in the past that were hard to blast easily. Most people prepare new panels by epoxy priming or using an undercoating such as 3m body schultz on insides of panels. But whats done as done, I think I would personally sand it down aways on areas you can and apply epoxy or a good undercoat product over it. As far as I understand, most rust convertors you should have a slightly rusty surface that you are applying it over, not sure on the por 15. Ohh by the way, howdy neighbor Welcome to hotrodders.

[crashtech]

POR-15 is not a rust converter. It merely adheres well to rust, and forms a moisture barrier to greatly reduce the progress of corrosion.

If you want to recoat POR-15, you must do it within a narrow window, or it must be sanded, for which you need to wait a couple days. Or, you can buy TIECOAT, made by POR-15 for this purpose.

I don't think you need to recoat it, and if you did, undercoating would be a more sensible material to use, IMHO. I hope you sanded your new fender before you applied the POR-15. It likes rough surfaces, not smooth shiny ones.

[JerryMopar]

I knew that it was not a rust converter, I was just waiting for someone to correct the other guys! Yes I did lightly sand the fender with some 120. It said on the can that it needed tooth to adhere. It seems to have stuck on and hardend well. I will have to check out this tie coat.

Jerry

[baddbob]

If you sand the POR with some 180 grit the epoxy will stick without the tie coat. I'm not a big fan of POR but do use it occasionally on interior areas where cleaning off corrosion would be almost impossible. Inside quarters, up under dashes, inside roof bracing, inside cowl areas. I wouldn't use the stuff on exterior areas-much better to remove the corrosion on cleanable areas and coat with a high quality epoxy as the base. Internal areas that do get POR then get treated with a cavity wax type moisture proof coating.