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  #1 (permalink)  
Old 10-03-2007, 07:08 PM
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Is light brown haze on steel a problem

I used Metal Ready which calls for a rinse with water.
metal looks great but has a slight light brown haze in
some areas of the frame. Looks like an inside of an apple
that's been exposed to air. Ok to primer over it?

TRx

Keith
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Old 10-03-2007, 09:28 PM
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Based on using the Metal Ready (a POR-15 product), I assume you are going to use POR-15 Rust Preventive paint as the primer. If that is indeed true, then the light brown haze you see on the metal is left behind by the Metal Ready application and is normal. Kind of looks light brown or yellow. Do not attempt to remove that. Sometimes in corners of the metalwork the Metal Ready will not be thoroughly rinsed out and will dry leaving behind a buildup that kind of resembles a small amount of powder - this can be wiped off. Apply the POR-15 rust preventive paint directly onto the metal either with a brush (it will flow out very nicely if you follow the directions) or sprayer (must be thinned if spraying). If the surface you are painting is going to be exposed to prolonged sunlight, then topcoat the rust preventive paint with a topcoat such as POR-15 BlackCote or similar product. I have found the BlackCote does not flow out as well as the rust preventive paint so I spray it when I use it. If no sunlight exposure is expected, the rust preventive paint will be sufficient. Just follow the directions and you won't have a problem.
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Old 10-04-2007, 08:55 AM
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I planned on using SPI epoxy primer...

Should I remove the brown haze then?

Thanks Cucumber,

Keith
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Old 10-04-2007, 09:41 AM
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Keith, the light golden brown or yellow haze you are seeing is the zinc-phosphate coating that is the result of using Metal Ready. Metal Ready can be used as a prep with any coating as it is an etcher and leaves behind the zinc phos coating after it dries. As long as you are sure it is not rust you are seeing and it hasn't been too long since you used the Metal Ready, then do not remove the haze and use your SPI according to it's directions. You can always re-use the Metal Ready product again if you are not sure.

When I did my frame, I used the Marine Clean degreaser, then Metal Ready, and then a coating all withing 24 hours. The Metal Ready left the steel with a dark yellowish, mustard colored kind of nearly transparent haze. The POR-15 literature says this is the normal resulting surface after the use of the product.
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Old 10-04-2007, 10:03 AM
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sounds good Cuccumber-I had the same idea about re-doing the metal ready if I had doubts..I just did the metal ready last nite..hope to epoxy primer Sat.
SPI does recommend the waterborne wax remover before the epoxy..I did buy that also.

Always worried about incompatibilities..ya know?..Lots of horror stories on here..

thanks for the input...appreciate it.

Keith
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Old 10-04-2007, 10:22 AM
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metal ready

Hen I used it I had to neutralize it with vinegar water or it kept working up the rust.
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Old 10-04-2007, 12:09 PM
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Quote:
Originally Posted by marty28arod
Hen I used it I had to neutralize it with vinegar water or it kept working up the rust.

Vinegar itself is acidic and so is the metal ready so how does Vinegar neutralize the Metal Ready?
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Old 10-04-2007, 05:14 PM
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Hmmmm?
I got a few opinions in this thread!

If you are going with epoxy, quit it with the metal prep! It is best and manufacturer advised to place epoxy over "clean" bare metal!

As for any POR15 product !!!!!
IMO!

Best Wishes!
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Old 10-04-2007, 05:23 PM
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hey crazy-
I quess I'm thinking the Metal Ready left it clean.
Most of the 55 truck is still beautiful after the media
blast 3 weeks ago..a few places on the frame had a
few spots that discolored which I assume was rust..
Planned on primering right after blasting but ended up
in Bermuda..stuff happens...

Thanks bud,

Keith
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Old 10-04-2007, 05:38 PM
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Well, If it is possible blast the questionable spots over. I realize it's extra work. But, not near as much extra work as doing it later! I shoot epoxy over freshly blasted metal ASAP. But, when I can't get it sealed up soon enough, sometimes to avoid the mess I will sand over it with 80 or 180. clean it and shoot it. The most important thing in this step is CLEAN! So, whatever it takes, my advise is, just be sure it is as clean as you can get it!
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