Primer??????

[48chyrscoupe]

Hi, today I picked up my daily driver from the body shop, a deer ran into the side so it was an insurance job.
My question is this, I was speaking with the shop owner, his family also owns a bodyshop supply company in a large center where I live. They carry PPG products. The shop owner said I should use etching primer on my 48 Chrys Coupe, then 2k epoxy primer,then surfacer, topcoat and clear. I told him, that I was not going to be going down to bare metal on the whole car but only in spots, those spots I would use a prep like Picklex, then I plan on spraying the entire car with Omni 2k or Transtar 2k primer. he said that wasn't going to be any good without etching primer, is this true, I :confused: thought epoxy was the best sealer primer to go an old car first.Thanx Fred

[Serge]

Actually, some epoxy primers will not stick over etch primer, check the p sheet of what you will be using, especially those that are surfacing primers at the same time, they don't like any acid. Acidity and the epoxy crosslinking process dont go well together...If you use picklex, make sure that you leave the picklex on the car for a few days before you shoot anything on it and then scuff it with a red scotchbrite before shooting any epoxy. Frankly, with epoxy you don't need any picklex if the metal is sound (rust free). If there is any rust, it is better to address it by metal replacement as any rust conversion is always a roll of the dice as to how much rust was converted in the process. You can't always see you have not converted all of the rust...

You can use epoxy that is a surfacing primer which makes sense as you don't have to buy two products and it goes direct to metal. So if you sand through, you simply re-shoot another few coats. And there is no iso in them, better for your health...

[48chyrscoupe]

Actually, some epoxy primers will not stick over etch primer, check the p sheet of what you will be using, especially those that are surfacing primers at the same time, they don't like any acid. Acidity and the epoxy crosslinking process dont go well together...If you use picklex, make sure that you leave the picklex on the car for a few days before you shoot anything on it and then scuff it with a red scotchbrite before shooting any epoxy. Frankly, with epoxy you don't need any picklex if the metal is sound (rust free). If there is any rust, it is better to address it by metal replacement as any rust conversion is always a roll of the dice as to how much rust was converted in the process. You can't always see you have not converted all of the rust...

You can use epoxy that is a surfacing primer which makes sense as you don't have to buy two products and it goes direct to metal. So if you sand through, you simply re-shoot another few coats. And there is no iso in them, better for your health...Thanx Serge, from a fellow Canadian in Manitoba. My car is not rusted out, but it's got some surface rust here and there, when it's sanded out it's solid 18 gauge sheet metal, but microscopically the corrosion is still there I would imagine. So on a project like this how do I deal with this. Acid treament followed by epoxy primer, my goal is to finish all body work, then sand and epoxy primer, then deal with outstanding mechanical, chroming, upholstery etc........Thanx again Fred

[Serge]

Picklex is good for this, however if it's not pitted and the metal comes clean you don't need any treatment. I try to epoxy on the same day I bring them to bare metal.

If you want to do the rust conversion route, use picklex and let it fully react for a few days before you paint over it. This will insure the acidity has reacted with the metal. Then before painting, simply scuff the area well with a maroon scuff pad. This will remove any of then whitish powdery coating it produces...

Personally, I wash the surface with some degreaser to make sure all of the acicity is removed. Then epoxy is all you need.

If I don't see any pitting or any rust and just shiny metal, I simply epoxy...

Hope this helps,

[48chyrscoupe]

Merci Serge

[48chyrscoupe]

Thanx a lot Serge, as you say and I agree if the metal comes clean, I think it is best to epoxy primer over the area as soon as possible, if pitted or a little deeper corrosion, I will use picklex as prescribed........Merci