epoxy primer problems

mrsbojigger

I am having problems with my Hudson rusting even after priming with an epoxy primer. I have spoken with my paint dealer but they could not give an explanation.

Here's the story: I had my car dipped and stripped an immediately after stripping and thorough, nutralizing and rinsing they applied a rust preventive called Rust Killer by Gem. This is a popular brand here in this area by painters. I got it to the Body Shop within 4 hours where upon it was sprayed with Transtar 6131 epoxy primer and 6141 Activator from top to bottom. The temperature was in the low 90s. My body man is a professional painter with many years of experience (he painted my award winning '47 Ford convertible) and I was watching him as he was mixing and spraying. Everything looked good and covered quite well. Back at home it was under cover but started rusting (surface rust) after a couple of weeks.

In the meantime my Camaro front clip was bead blasted locally and primed with DuPont 2580 epoxy primer and 2505 Activator.
Note: This is a different brand and sprayed by a different painter, not my painter.After the clip was welded in place in the Hudson it started rusting too. It was not at my home during this time but at a body shop. I got back with my guy that bead blasted my Camaro front clip and he said that it had been a bad batch of DuPont 2580 and he would remove the bad primer by bead blasting it again and re-shooting a new batch of DuPont 2580. I asked him at that time to remove all the Transtar 6131 epoxy primer on the rest of the car body by a light bead blast and re-shoot the whole body with the NEW DuPont 2580 which he did. This part I had to pay him for. Guess what? It also has rust (surface rust) coming thru in places on this new epoxy primer.
What do I do now? I need to solve this so I can finish the car. I have been out twice the money on stripping and priming.
As a side note the car is not out in the weather.
Peace,
Chaz

[Deleted User]

Chaz, I'll ask my neighbor what brand and type of epoxy primer he uses. Its also the stuff he has already saved for my Hudson.

Jay

[Deleted User]

If the painters were spraying in high humidity environments, there is a possibility that the air/paint mixture as it comes out of the gun is picking up water vapor in the ambient air and entrapping it in the paint coating. This is a different problem than having water vapor in the air line. This can happen even if you have dry air at the gun.

I'd be willing to bet that these painters were not painting in a climate controlled booth, with proper temperature AND humidity control.



Tom Drew

mrsbojigger

Yes, they were not in a booth and yes, it was high humidity.
Peace,
Chaz

[Deleted User]

Chaz,



I think we've determined the source of your problem. Unfortunately, you still have to get your painting done. You have two choices now: (1) Do the painting inside a booth with climate control - (2) Do the painting outside a booth on a day with low humidity.



IMHO, if the guys you had painting for you are charging for their services, they should really know better than to be painting ouside on a day with temperatures in the 90's with high humidity. How can you run a body shop in Texas and not be aware of the potential problems of painting under conditions of high humidity? And the paint supplier had no clue? Did all these guys just recently move there from Tibet? Hopefully these guys will make good on their work for you.



Tom