what is a good rust proof etching primer

[73chargers4404]

what is a good rust proof etching primer,ive been watching all these hotrod shows and they say after they get blasted they prime the car in rust proofing primer.any idea on what they talking about.thanks brian

[mopar_madman]

I use a liquid metal prep or refered to as metal conditioner ( dupont 5717 S, piclex, metal ready are examples) It is a phosphoric acid used to etch the metal for adhesion and remove light corrosion. Then I use epoxy primer ( all the paint companies have their own brand) This seals the metal and you can put your high build primer over it for block sanding. Some people have different methods for their corrosion protection, this is the method I use, I'm sure others will give you some other ideas.

[Drop Top]

I agree with Madman. Only I use PPG's dplf or Valspars dp line. I'm not a big Du Pont fan. I'm not saying its bad. I just dont like it.

[hemi-hampton]

Better then ppg's epoxy primer is what they call a self etching wash primer, This usually has a yellowish greenish transparent look & a strong acid small due to the Chemicals in it but these chemicals are best suited for bare metal protection. As far as I know no Metal prepping metal conditioners needed or used since self etching. But I like to sand all the metal with 80 grit anyways to clean up & then add the wash Primer. Add 1 coat Wash Primer then 1 coat ppg Epoxy Primer. Then it can sit forever being protected while you do the bodywork. LEON.

[73chargers4404]

 use a liquid metal prep or refered to as metal conditioner ( dupont 5717 S, piclex, metal ready are examples) It is a phosphoric acid used to etch the metal for adhesion .so this just cleans the metal and preps it for primer .epoxy primer is that a etching primer and if you guys could get part numders of all this stuff the conditioner and primer  ppg and dupont tha guys at oreillys i dont trust much all i want something i wont have to take back off.thanks

[73chargers4404]

im still needing help with thanks

[Drop Top]

Du Pont -> 5717S <-This is the part number for the Metal Conditioner
PPG also makes a Metal Conditioner But I can't think of the part number. If you took the labels off the bottle you would not be able to tell them apart.
PPG's DPLF40 or DPLF50 and so on. DPLF is the part number for the primer the number is the color. 40 is a green/gray 50 is black. This type of primer is also a very good sealer for under the color coat. So you get 2 types of primer for the price of one.
I don't like useing a self etch primer. Its easier but dosent work as well. I've had too many comebacks with it so I quit useing it. Gets too expensive for me when I have to redo something. Nothing beats using metal etch and then a good bare metal primer.

[73chargers4404]

i thougt etching primer was what you wanted to use on bare metal what the differnece in etching primer and self etching primer.i plan on paying someone to paint it candie apple red but i was going to primer it my self.thanks

[mopar_madman]

metal cond. is a liquid acid that etches but then you need a epoxy primer over it to seal the bare metal. There is a sprayable primer called etching primer some use that instead of epoxy. Its more a matter of preference with some. The sprayable is one step and you can do your High build primer over it. Some people like to acid etch because it also removes any surface rust that is begining and the epoxy goes over it. The method I  like is the metal cond. prep You can clean your bare metal with it and then do your body work, It will hold off the corrosion (make sure you sand any areas before you put filler on) When your done with body work you can prime the surface with epoxy and if there are any areas you want to work more you can put filler over epoxy or just spray your high build primer and start block sanding. There are more then one way to do this but I would say this is most popular (just my opinion) I'm sure others will give you their methods just find one that works best for you.

[Lord Warlock]

POR15 used to make a good primer that was rust proof.  You can check them out to see if it is still available. 

[Telvis]

PPG DP epoxy primer is self etching.