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GALVANIZED COWLING PAINT
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
I'm about as far away from being a body expert as you can get.
I sandblasted my cab several months ago and then sprayed epoxy primer directly on the bare metal. I mixed it as a sealer rather than a primer because this is a loooong term project and its going to be sitting for quite a while before any color goes on it (primer is mixed equal parts of primer and hardener, for a sealer it's mixed 2 parts primer, one part hardener and one part reducer).
I didn't spray a self-etching primer, just used the epoxy. I sprayed it March 15 so it's coming up on four months and there is no sign of any lifting or peeling.
I sandblasted my cab several months ago and then sprayed epoxy primer directly on the bare metal. I mixed it as a sealer rather than a primer because this is a loooong term project and its going to be sitting for quite a while before any color goes on it (primer is mixed equal parts of primer and hardener, for a sealer it's mixed 2 parts primer, one part hardener and one part reducer).
I didn't spray a self-etching primer, just used the epoxy. I sprayed it March 15 so it's coming up on four months and there is no sign of any lifting or peeling.
More Turbo
Joined: Mar 2012
Posts: 515
Likes: 8
I'm about as far away from being a body expert as you can get.
I sandblasted my cab several months ago and then sprayed epoxy primer directly on the bare metal. I mixed it as a sealer rather than a primer because this is a loooong term project and its going to be sitting for quite a while before any color goes on it (primer is mixed equal parts of primer and hardener, for a sealer it's mixed 2 parts primer, one part hardener and one part reducer).
I didn't spray a self-etching primer, just used the epoxy. I sprayed it March 15 so it's coming up on four months and there is no sign of any lifting or peeling.
I sandblasted my cab several months ago and then sprayed epoxy primer directly on the bare metal. I mixed it as a sealer rather than a primer because this is a loooong term project and its going to be sitting for quite a while before any color goes on it (primer is mixed equal parts of primer and hardener, for a sealer it's mixed 2 parts primer, one part hardener and one part reducer).
I didn't spray a self-etching primer, just used the epoxy. I sprayed it March 15 so it's coming up on four months and there is no sign of any lifting or peeling.
This is the best shot of the cowl that I got in the sunlight, but anyway, I would recommend using the epoxy primer.
More Turbo
Joined: Mar 2012
Posts: 515
Likes: 8
Thanks man! I posted some more pictures in my build thread, if you're interested 
As a side note on using epoxy, I'm sure you already know Mike, but anyone spraying that stuff should really get themselves a respirator for when they spray.
As a side note on using epoxy, I'm sure you already know Mike, but anyone spraying that stuff should really get themselves a respirator for when they spray.
Cargo Master
Joined: Nov 2010
Posts: 3,172
Likes: 101
From: darlington
epoxy
The way i had it explained to me,new steel self etching primer,has zinc rust inhibitor,,,,old steel like our trucks epoxy paint,attaches well.But 15 years ago self etching was the bomb.No one mention epoxy paint.that I know of.
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
And yeah, isocyanates are nasty stuff, definitely use a respirator. I already knew, but some might not. Thanks for the reminder.
Thread Starter
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Lead Driver
Joined: Mar 2008
Posts: 7,182
Likes: 380
From: Near Los Angeles
Thanks for responding, guys. So, where do I go from here? Should I just feather out the parts that are flaking and spray the whole thing with epoxy? Or does the entire coat need to come off before spraying the epoxy?
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
If it's peeling in one area, there's no way to be sure it won't do it in other areas once the color is on.
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Fleet Mechanic
Joined: Feb 2011
Posts: 1,410
Likes: 42
From: Michigan
All you have to go thru is the etching primer to get back to metal. As MikeoOoOo stated, no guarantee the rest of it won't flake.
Thread Starter
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Lead Driver
Joined: Mar 2008
Posts: 7,182
Likes: 380
From: Near Los Angeles
I really wanted to be done with the louvers. I can't tell you how many times I've sanded them. So, just to make sure that I understand, I'm going to shoot epoxy primer right over the bare metal, right? I'll go back and reread the thread. If you've already stated the procedure please don't bother doing it again.
Kevin.
Kevin.
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
I really wanted to be done with the louvers. I can't tell you how many times I've sanded them. So, just to make sure that I understand, I'm going to shoot epoxy primer right over the bare metal, right? I'll go back and reread the thread. If you've already stated the procedure please don't bother doing it again.
Kevin.
Kevin.
I really understand about the louvers. I sandblasted my cab so I didn't have to sand them to apply the epoxy, but when I sprayed it, it dried with a slightly rough texture. I wanted a smooth to the touch finish before I went any further so I had to sand.....and sand......and sand the louvers. It's not hard at all, just really, really tedious.
More Turbo
Joined: Mar 2012
Posts: 515
Likes: 8
I really wanted to be done with the louvers. I can't tell you how many times I've sanded them. So, just to make sure that I understand, I'm going to shoot epoxy primer right over the bare metal, right? I'll go back and reread the thread. If you've already stated the procedure please don't bother doing it again.
Kevin.
Kevin.
I'll also add that I used Eastwood epoxy primer, and can vouch for the quality, if you want to look into it.
Thread Starter
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Lead Driver
Joined: Mar 2008
Posts: 7,182
Likes: 380
From: Near Los Angeles
So I asked for epoxy primer and the guy gave me a high build poly primer. He said it's dry in 20 minutes so be careful. Tomorrow I am going to spray. Is poly primer the correct stuff? Thanks guys. k