[fox]

I got a 82 Grand prix that im fixing up for when i turn 16 next year. The body had lots of dents, rust. i had sanded the car (not to bare metal), used bondo(never took all the paint off underneath) and primed the whole car up.

With all this damn salt on the road, a friend of mine has a car thats all in primer and its showing rust spots after a few months. After seeing that i want to do a better job on my car so that it doesnt rust too and the bondo crack and fall off since i never removed the paint.

Im going to get like a new hood, doors, and front side pannels at the auto wreckers for my car since they were pretty bad and got **** loads of bondo on them. then I am going to sand the car right down to the metal and i want to do it the right way.

The car wont be painted for a long time(maybe just keep it primer), so... my question is, what do i use? a Epoxy primer and like clear cote or somthing after so the primer doesnt absorbe water/moister?


Thanks

[302 Z28]

It's a bad deal to apply Bondo on top of paint, it will eventually let go. The only primer that will not allow rust after a period of time is epoxy primer/sealer. Epoxy primer requires no clear coat and can be left as is for ever.

Vince

[TooMany2count]

Originally posted by 302/Z28
The only primer that will not allow rust after a period of time is epoxy primer/sealer. Epoxy primer requires no clear coat and can be left as is for ever.

Vince

soooooooo true, we drove our 40 chevy for about 10 yrs in Epoxy primer & NEVER had a problem w/it....joe

[fox]

is the expoxy primer any stronger then the normal primer? ive just noticed the normal stuff scratchs easy and stains when i touch it with my grease hands. if not.. is ther anything i can put over top for a more durable finish? thanks again

[astroracer]

The problem is primer, any kind of primer, is not meant to "seal" the paint. It is still porous and will allow water, grease and whatever else that comes in contact with it to adhere and possibly soak into it. You really need to shoot some topcoat over the primer to seal it.
Mark

[302 Z28]

Originally posted by astroracer
The problem is primer, any kind of primer, is not meant to "seal" the paint. It is still porous and will allow water, grease and whatever else that comes in contact with it to adhere and possibly soak into it. You really need to shoot some topcoat over the primer to seal it.
Mark

Not necessarily so, epoxy primer is a sealer/primer and will not allow moisture penetration, or bleed through from whatever is underneath. As stated, depending on what hardener you use with PPG K36, it can also double as a sealer.

There is primer, then there is epoxy primer, the two are not the same.

Vince

[Kevin45]

If you put primer on with RATTLE CANS you will need to remove it and do it correctly. Wet sand the whole car down with 360/400 wet or dry paper. Wash and dry it after that. Grind all rust down to bare metal, apply bondo where needed, finish off the bondo work, blow off the complete car, clean with Prep-Sol or other type of pre-cleaner, tape up the car and prime with epoxy primer.

Kevin

[evltwin]

Even epoxy primers need a top coat.

I used DP 90 black then used satin black lacquer on top.

From what I was told the UV light is problem for the epoxy primers. There was a magazine article that talked about the different ways to get a suede black paint job. I no longer have a copy of the article. I recall they even talked about John Deere flat black paint. Don't think I would use it but they talked about it.

One note some of the paint on my car has develop a polished look. Some of the polish came from the car cover others from washing it.


Have fun!

[astroracer]

Not necessarily so, epoxy primer is a sealer/primer and will not allow moisture penetration, or bleed through from whatever is underneath. As stated, depending on what hardener you use with PPG K36, it can also double as a sealer.

There is primer, then there is epoxy primer, the two are not the same.

Vince

Yes, epoxy primers are called "sealers" but, they are used to seal the body work/bare metal/old paint from the new top coat. They will not seal all of this work from the elements. They will "protect" it for a time but, like Kevin said, sunlight and the elements will break it down very quickly then you will have a mess on your hands. Don't spray this stuff on your car expecting it to never rust because it will. If anyone is going to invest the time and effort to paint a car take the time to do it correctly. Yes it may cost some money up front but what it will save you down the road is worth it...

[302 Z28]

Again, I beg to differ. There is a nostalgia class of street rods that are finished in nothing but primer, epoxy primer. These rods cope with the elements quite well.

Vince

[fox]

uhh hmm getting lots of differnt replys...

im going sand my whole car to bare metal then i want to bondo any dents and stuff. ok then i wash the car down good with a cleaner then primer the whole car with spray/rattle can(epoxy primer) and done?

[302 Z28]

Originally posted by fox
uhh hmm getting lots of differnt replys...

im going sand my whole car to bare metal then i want to bondo any dents and stuff. ok then i wash the car down good with a cleaner then primer the whole car with spray/rattle can(epoxy primer) and done?

Spray rattle can primer is NOT epoxy, I don't care what it says on the can. Epoxy primer requires a catalyst to be mixed with it to cure. This is impossible to do in a spray can.

Vince

[fox]

ok... so then i will have to buy a spray gun?and need a air compress for a spray gun right? or after i strip the metal and do all the body work drive it somewhere to get primed?

[Kevin45]

Fox....go back and read thru what was posted. You don't need to sand the whole car to bare metal. You DO NOT want to use rattle cans. Also take a peek into the Knowledge Base. There are some very fine articles on body work with step by step instructions. The main thing is to do it right the first time. It may take a little or a lot longer but it will still be less time than having to do it over.

Kevin

[fox]

The Reason i want to go to bare metal is all the pits/chips in the paint under the primer i got right now, all the bondo get it all off, i also noticed when i went to bare metal i did see some surfarce rust in a few places, and just do a nice clean job.

i just talked to a friend and he has a air compresser and is able to borrow a spray gun from work.