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  #1  
Old 02-13-2020, 11:18 PM
elekt elekt is offline
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Default Need some advice. Repairing Remington 870 damaged by dog piss.

Apparently dog piss is extremely corrosive.

Dog pissed on this 870, it went unnoticed for a long time.

Few questions I'm hoping you guys can help answer.

1. Should I be worried about the integrity of the receiver now? It's not extremely deep but it's definitely pitted.

2. I plan to remove all the rust and paint with something like aluma-hyde. What can I use to fill the pitting so I end up with a decent finish?


Last edited by elekt; 02-13-2020 at 11:35 PM..
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Old 02-13-2020, 11:24 PM
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Bronze wool..kroil..semichrom
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Old 02-13-2020, 11:58 PM
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Id be pissed
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Old 02-14-2020, 12:04 AM
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Id be pissed
Better pissed off than pissed on.

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Old 02-14-2020, 12:41 AM
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How do you know it was dog piss if it went unnoticed?
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Old 02-14-2020, 12:51 AM
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Quote:
Originally Posted by elekt View Post
Apparently dog piss is extremely corrosive.

Dog pissed on this 870, it went unnoticed for a long time.

Few questions I'm hoping you guys can help answer.

1. Should I be worried about the integrity of the receiver now? It's not extremely deep but it's definitely pitted.

2. I plan to remove all the rust and paint with something like aluma-hyde. What can I use to fill the pitting so I end up with a decent finish?

Painting over the pits is not going to stop the rust.
I would blast and parkerize it to completely neutralize any of the rust down in the pits.
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Old 02-14-2020, 12:51 AM
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Now thats an 870 with character 🙂
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Old 02-14-2020, 3:01 AM
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Originally Posted by eviioiive View Post
How do you know it was dog piss if it went unnoticed?
Unless another animal broke into the house and pissed on it and managed to escape without leaving an sign of entry... it was my dog. Dog piss smells like dog piss, even after a couple weeks.
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Old 02-14-2020, 3:04 AM
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Painting over the pits is not going to stop the rust.
I would blast and parkerize it to completely neutralize any of the rust down in the pits.

Thanks!
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Old 02-14-2020, 5:29 AM
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Mechanical integrity is most likely OK. Might be some internal corrosion in the nooks and crannies that will need to be taken care of. Heavy bead blast and hot blue or abrasive blast and parkerizing. If you were to use some sort of spray on coating it will need to be prepped by blasting anyway to stop the rust.
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  #11  
Old 02-14-2020, 5:53 AM
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Bead blast and park then maybe cerakote.
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Old 02-14-2020, 8:12 AM
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Yeah, blame the dog. It's an 870. Toss it and start over.
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Old 02-14-2020, 8:42 AM
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Fido was just telling you how much he likes your shotty, wants it for himself.
Randall has the right idea, blast and park it.
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Old 02-14-2020, 8:54 AM
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Doesn’t look that bad to me, I would follow Randals advise.

If it’s a beater HD gun, just wire wheel it and spray paint it. Just be aware the rust will likely reappear down the road going this route.

The real question here, is why your dog thinks it’s ok to piss on your shotgun?
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Old 02-14-2020, 11:45 AM
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Commercial rust remover to remove and stop the rusting. Some brands will leave a phosphate residue that will help prevent further rust. Then sand with fine grit paper. Paint and bake(?).
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Old 02-14-2020, 12:21 PM
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https://www.por15.com/POR-15-3-Step-Stop-Rust-System
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Old 02-14-2020, 12:38 PM
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Kroil and buff. Then buff again.

Apply some metal black out.
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Old 02-14-2020, 2:21 PM
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Cat pee is worse trust me
Soak in vinegar for a day or two removes the rust and finish then steel wool it then sand it with 220 then soak in acetone to etch the surface,if the pits are not too deep you can do a process of polish from a rough wire wheel to a fine wire wheel to cloth wheel takes a lot of time!!!!
Did this to a Mossberg 500 barrel.
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Old 02-14-2020, 2:24 PM
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That 870 would look cool Cerakoated in pink camo
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Old 02-14-2020, 2:25 PM
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Even your dog thinks that Remington has gone to sh*t
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Old 02-14-2020, 3:48 PM
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Originally Posted by Pofoo View Post
Commercial rust remover to remove and stop the rusting. Some brands will leave a phosphate residue that will help prevent further rust. Then sand with fine grit paper. Paint and bake(?).
Do this, but don't sand before you paint.

Phosphate residue is basically a poor man's parkerize.
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Old 02-14-2020, 4:48 PM
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Id be pissed
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Better pissed off than pissed on.

No need to get all pissy about it.
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Old 02-14-2020, 4:50 PM
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SHOOT the dog.
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Old 02-14-2020, 5:27 PM
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At least it wasn't a pitbull this time.





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Old 02-14-2020, 8:49 PM
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Quote:
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Commercial rust remover to remove and stop the rusting. Some brands will leave a phosphate residue that will help prevent further rust. Then sand with fine grit paper. Paint and bake(?).
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Do this, but don't send before you paint.

Phosphate residue is basically a poor man's parkerize.
Ya. Phosphoric acid being the active ingredient. Iron oxide > iron phosphate.

POR15 is pretty good stuff.
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  #26  
Old 02-16-2020, 11:43 AM
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If it were mine I would first arrest the corrision on all the internal parts and receiver surfaces. Then I'd bead blast the snot out of the exterior. Then carefully etch the exterior with a uniform, brushed on coat of naval jelly and let that sit for 24 hrs. Wash it off, dry thoroughly, and spray on an even coat of rust generator-the hydrogen peroxide/vinegar/salt solution. Then coat with a gun-compatible satin clear-coat.

If you can't fight rust-join it!
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Old 02-16-2020, 1:01 PM
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It's fine. Clean it and rattle can it and shoot it another 20 years in duck blinds and rain.
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Old 02-17-2020, 4:25 AM
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It's an 870, you are over thinking this.
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Old 02-19-2020, 7:01 PM
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I do Cerakote as a side business and I've seen much worse come in. As far as the integrity of the receiver, there is nothing to worry about.

When it comes to cleaning it up, make sure you get all the rust out. Any of the solutions that the others have talked about to passivate or neutralize the rust. Once you do that though I would blast it really well. Don't use glass bead, it actually peens down the metal and any rust not netrualized left in the pits will restart. Make sure it is blasted with a fine aluminum oxide or something similar that will actually get down into the pits. Once you get it cleaned, coat it with something that will hold up to typical gun solvents, some of them will bubble regular paint and you'll be back to the beginning. As you might imagine, I prefer Cerakote, but there are a number of good options. Trying to fill in the pitting is a bit of a pain and you probably couldn't do it with things like alumahyde since it primarly works at the surface and doesn't build up so that the pitting would get filled in. If you really want to you'll have to go to something that goes on thicker that you can sand and reapply. Good Luck...
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Old 02-19-2020, 7:17 PM
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I do Cerakote as a side business and I've seen much worse come in. As far as the integrity of the receiver, there is nothing to worry about.

When it comes to cleaning it up, make sure you get all the rust out. Any of the solutions that the others have talked about to passivate or neutralize the rust. Once you do that though I would blast it really well. Don't use glass bead, it actually peens down the metal and any rust not netrualized left in the pits will restart. Make sure it is blasted with a fine aluminum oxide or something similar that will actually get down into the pits. Once you get it cleaned, coat it with something that will hold up to typical gun solvents, some of them will bubble regular paint and you'll be back to the beginning. As you might imagine, I prefer Cerakote, but there are a number of good options. Trying to fill in the pitting is a bit of a pain and you probably couldn't do it with things like alumahyde since it primarly works at the surface and doesn't build up so that the pitting would get filled in. If you really want to you'll have to go to something that goes on thicker that you can sand and reapply. Good Luck...
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  #31  
Old 02-25-2020, 2:26 AM
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Hoppes has a rust dissolving compound in it, you would be amazed at how much rust can be cleaned with a good wipe/scrub with it. Use coarse rags/fingernails to scrape the rust out. Doing this won't scratch the blued surface or remove bluing like steel wools will. Last resort is to use 0000 steel wool lightly/sparingly. Try doing this first and then post photos. Minor pitting can be re-blued with cold bluing agent. It's not a lifetime fix like re-bluing but it might be good enough if you don't mind visible blemishes.
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  #32  
Old 02-25-2020, 5:51 AM
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Hoppes , Kroil , even WD40 with a chunk of burlap . Keep rubbing it in .
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