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rust under primer
#1
So I got the primer off fender and of corset it had surface rust due to cheap primer that I put on. Now I have used 80 grit by hand long board and orbital but cannot get that rust off. It is very hard to see but it is a lot of little spots and I feel leaving it is dumb but I might be the dumb one by continue to sand it. I have also tried wire wheel so looking for the sme to throw me a line. Thanks[/u]


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1973 MACH ONE H CODE "RUSS"
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#2
rentascout;63194 Wrote:So I got the primer off fender and of corset it had surface rust due to cheap primer that I put on. Now I have used 80 grit by hand long board and orbital but cannot get that rust off. It is very hard to see but it is a lot of little spots and I feel leaving it is dumb but I might be the dumb one by continue to sand it. I have also tried wire wheel so looking for the sme to throw me a line. Thanks[/u]
Well that right there is why I keep telling everyone to use epoxy primer as your base on bare metal..Any way..soak a clean rag in plain vinegar..lay on the rust spots..wrap/ cover with saren wrap..let sit over night..remove..clean with with & grease remover..d.a. with 80..epoxy prime..
http://www.7173mustangs.com/thread-rust-...k+this+out

LOVE OF BEAUTY IS TASTE..THE CREATION OF BEAUTY IS ART
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#3
Yeah that is why I was sanding it down because u told me my rattle can is trash. I have quite a few areas that need this and still need to fill the bad spots should I wait to wrap until I get closer. It is on my fender which I took off and now I am scraping undercoating off inside to clean that rust. I knew someone would come through as always

1973 MACH ONE H CODE "RUSS"
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#4
Ospho works great as a surface rust remover and short-term preventer. It is otherwise known as phosphoric acid, and you can find it at HD or Lowes. When it dries, it turns to a whitish residue. It is very easy to remove and will kill those tiny rust spots. Once removed, simply use wax and grease remover and prime the panel with epoxy primer.
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#5
I am trying a small piece with the vinegar and hoping it will work. I have alot of spots and of course I do not have saran wrap go figure

1973 MACH ONE H CODE "RUSS"
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#6
I tried it but I could not seal it off and when I took the rag off the next morning it looked like s even bigger spot real nasty, but g and wax remover and sw took it off or most of It nice trick

1973 MACH ONE H CODE "RUSS"
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#7
midlife;63212 Wrote:Ospho works great as a surface rust remover and short-term preventer. It is otherwise known as phosphoric acid, and you can find it at HD or Lowes. When it dries, it turns to a whitish residue. It is very easy to remove and will kill those tiny rust spots. Once removed, simply use wax and grease remover and prime the panel with epoxy primer.
Do not use ospho with anything you intend to epoxy prime..It's not necessary & will cause adhesion problems with the epoxy. It's good stuff for rust removal around the home. Thats about it..There's plenty of horror stories about these so called rust converters encapsulaters etc..The only one I know of with a patent & proven lab testing is rust bullet..Also look at the top builders I have yet to find one using por-15 or any of the other stuff..The only stuff they use is epoxy primer & rust bullet..There is no substitute for good prep..Keep it simple & save your money.
http://www.dodgecoronet.com/forum/showth...y-failure!



rentascout;63273 Wrote:I tried it but I could not seal it off and when I took the rag off the next morning it looked like s even bigger spot real nasty, but g and wax remover and sw took it off or most of It nice trick
You have to use the plastic..It keeps it wet..You should not let it dry out..Sometimes it only takes a few hours not over night..

LOVE OF BEAUTY IS TASTE..THE CREATION OF BEAUTY IS ART
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#8
I got the tools to do it right. I am on a groove and trying to strip these fenders on the inside is rough I took no time last time when I painted them now I am having to start over fresh, that is the way it goes

1973 MACH ONE H CODE "RUSS"
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#9
Qcode351mach;63279 Wrote:
midlife;63212 Wrote:Ospho works great as a surface rust remover and short-term preventer. It is otherwise known as phosphoric acid, and you can find it at HD or Lowes. When it dries, it turns to a whitish residue. It is very easy to remove and will kill those tiny rust spots. Once removed, simply use wax and grease remover and prime the panel with epoxy primer.
Do not use ospho with anything you intend to epoxy prime..It's not necessary & will cause adhesion problems with the epoxy. It's good stuff for rust removal around the home. Thats about it..There's plenty of horror stories about these so called rust converters encapsulaters etc..The only one I know of with a patent & proven lab testing is rust bullet..Also look at the top builders I have yet to find one using por-15 or any of the other stuff..The only stuff they use is epoxy primer & rust bullet..There is no substitute for good prep..Keep it simple & save your money.
http://www.dodgecoronet.com/forum/showth...y-failure!

Huh. I did forget to mention that you need to scuff the panel before W&G remover and priming. It's been a long time, but I believe you have to use water (yes! water) to rinse the ospho residue off.

As far as ospho and adhesion problems? I did a large fraction of the car without issues.

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#10
midlife;63344 Wrote:
Qcode351mach;63279 Wrote:
midlife;63212 Wrote:Ospho works great as a surface rust remover and short-term preventer. It is otherwise known as phosphoric acid, and you can find it at HD or Lowes. When it dries, it turns to a whitish residue. It is very easy to remove and will kill those tiny rust spots. Once removed, simply use wax and grease remover and prime the panel with epoxy primer.
Do not use ospho with anything you intend to epoxy prime..It's not necessary & will cause adhesion problems with the epoxy. It's good stuff for rust removal around the home. Thats about it..There's plenty of horror stories about these so called rust converters encapsulaters etc..The only one I know of with a patent & proven lab testing is rust bullet..Also look at the top builders I have yet to find one using por-15 or any of the other stuff..The only stuff they use is epoxy primer & rust bullet..There is no substitute for good prep..Keep it simple & save your money.
http://www.dodgecoronet.com/forum/showth...y-failure!

Huh. I did forget to mention that you need to scuff the panel before W&G remover and priming. It's been a long time, but I believe you have to use water (yes! water) to rinse the ospho residue off.

As far as ospho and adhesion problems? I did a large fraction of the car without issues.
IMHO just not worth the risk..labor or expense....There's no reason to use it..As I said I have yet to see any top builders use anything but media blasting..epoxy primer...rust bullet...Why is that ? The answer is simple..when you do this for a living & someone is paying you big bucks to restore refinish a vehicle..if some thing goes wrong you have to eat it & make good =redo=money out of your pocket...So you use tried & true top notch products with proven results..Media blasting is the rust removal standard in any top notch restoration.. & most top notch builders will reblast sand down a area if it has flashed rusted vs using something that COULD potentially ruin a paint job..A hobbyist or backyard guy falls into the hype of products like this much easier..He doesn't have a business to run nor does his name ride on the quality of his work so a failure doesn't really carry the same consequences.

LOVE OF BEAUTY IS TASTE..THE CREATION OF BEAUTY IS ART
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