Have new to me Daewoo AR-100 and MAX-1, need to remove rust on front sight blocks

[ARCHIVED THREAD] - Have new to me Daewoo AR-100 and MAX-1, need to remove rust on front sight blocks

Posted: 8/28/2017 4:26:20 PM EDT

So I recently came into a Daewoo AR-100 and MAX-1. Internally they look great. Externally they're good except they have some surface rust and the front sights are super rusty. I want to fix this front sight problem.

I was thinking about 2 approaches to fix it without removing the front sight, because I'm not set up to do that kind of work and I don't have the 'woo knowledge to work on them.

1) A bucket of Evapo-Rust with the rifles inserted just past the front sight.

b) Trying rust-removal electrolysis with, again, the barrels inserted just past the front sight.

Would there be any issue with either method?

Would one be preferable over the other?

Is there a better approach?

Would either of these methods mess up the barrel?

Does anyone have a spare front sight block for either of these rifles?

Both

AR-100

MAX-1

Edit: While the rust doesn't look great, it looks MUCH worse with the camera flash

Posted: 8/24/2017 12:17:17 AM EDT

[#1]

I was hoping someone would know a source for parts. Daewoorifleparts in AZ just went out of business. I've never seen anyone offer gas blocks.
I think you'd be better off having someone bead blast and see what's left of them. They need to be reparkerized regardless.

Posted: 8/24/2017 5:49:43 AM EDT

[#2]

Quote History

Quoted:
I was hoping someone would know a source for parts. Daewoorifleparts in AZ just went out of business. I've never seen anyone offer gas blocks.
I think you'd be better off having someone bead blast and see what's left of them. They need to be reparkerized regardless.

View Quote

Yeah, I'm just worried bout the pins if I remove them.

Posted: 8/26/2017 3:45:56 AM EDT

[#3]

Anybody else have any thoughts?

Posted: 8/26/2017 7:18:12 PM EDT

[#4]

Nope, just me.

lol

I wouldn't worry about hurting the pins. I've removed and re-installed many solid pins like that (mostly on gas blocks) and only one got damaged other than cosmetically. Just use a correct cup tip punch. You may need serious heat.

Finding replacement pins would not be difficult if you were to need them. (You won't.)

The pins don't necessarily have to be removed for a blast and re-park job, but if there might be rust under the block (and that does appear likely), I would remove everything.

Posted: 8/28/2017 4:26:55 PM EDT

[#5]

Moved to GD per OP's request.

Posted: 8/28/2017 4:54:46 PM EDT

[#6]

Soak them in ATF and then take a brass brush to them

Posted: 8/28/2017 4:58:51 PM EDT

[#7]

Metal rescue rust remover....

Posted: 8/28/2017 4:59:08 PM EDT

[#8]

Coat with naval jelly. Just wear gloves and don't get it on any wood or plastic.

Posted: 8/28/2017 4:59:35 PM EDT

[#9]

Quote History

Quoted:
Soak them in ATF and then take a brass brush to them

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Attached File

Posted: 8/28/2017 5:02:36 PM EDT

[#10]

Small stainless wire brush to knock off rust.

B/c blue and rust remover after, lightly applied followed by kroil

Posted: 8/28/2017 5:08:02 PM EDT

[#11]

I guess if it were me, I would remove the rusty parts, sand blast them and have them recoated.

Posted: 8/28/2017 5:32:02 PM EDT

[#12]

Bead blast and re-park.

Posted: 8/28/2017 9:38:26 PM EDT

[#13]

Thanks for all the replies. Lots of recommended methods. No is really biting on either of my ideas though which is probably a sign.

I'll probably start with the cheapest, lowest effort first because of time and tools, then go from there. I'm still open to other suggestions...

...and also recommendations on where to get Daewoo parts now that the main source closed.

Posted: 8/28/2017 9:48:06 PM EDT

[#14]

I am the only other joker I know that owns a MAX I!

Probably just scrape the Daewoos clean and apply some gun-kote...bores should be chrome...and at least the MAX-I is gas impingement with a stainless tube

Posted: 8/28/2017 10:59:54 PM EDT

[#15]

Quote History

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https://www.AR15.Com/media/mediaFiles/92687/atf-da-18596306-292786.JPG

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View All Quotes

Quote History

Quoted:

Quoted:
Soak them in ATF and then take a brass brush to them

https://www.AR15.Com/media/mediaFiles/92687/atf-da-18596306-292786.JPG

Posted: 8/28/2017 11:01:08 PM EDT

[#16]

Quote History

Quoted:

Yeah, I'm just worried bout the pins if I remove them.

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Im gunna bet they used AR taper pins. See if they are the same size and cut to fit

Posted: 8/28/2017 11:03:01 PM EDT

[#17]

Quote History

Quoted:
Coat with naval jelly. Just wear gloves and don't get it on any wood or plastic.

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Came here to say this

Posted: 8/28/2017 11:04:59 PM EDT

[#18]

And I will take that nylon seat belt sling off your hands on the left rifle

Posted: 8/28/2017 11:22:40 PM EDT

[#19]

This shit actually works, and safe.

Home Depot

Posted: 8/28/2017 11:32:55 PM EDT

[#20]

Wire brush and some flat black Krylon!

Posted: 8/28/2017 11:41:08 PM EDT

[#21]

I've become a huge fan of electrolysis unless you know someone with a bead blaster. If memory serves it takes a regular AR post/detent/spring anyway, no need to replace the block, just replace the "guts".

Posted: 8/28/2017 11:46:44 PM EDT

[#22]

Sandblast and reparkerize it.

Posted: 8/29/2017 1:41:33 AM EDT

[#23]

You would have to find someone with a broken rifle to get the parts would be my guess.

Take them apart and press off the gas blocks and do it right. The barrels are both chromed, so I would bet they are fine.

Were they stored barrel down in a bucket outside?

Posted: 8/29/2017 1:44:59 AM EDT

[#24]

Wire wheel. That's what i would do with an axe that it otherwise rust free.

Posted: 8/29/2017 1:52:38 AM EDT

[#25]

Nothing much else to add to what's already been stated but I would for sure remove the gas blocks before treating them.

I have a K-2 and love it.

Since these rifles tend to be hard to find I'm curious as to how you came by yours and how they got in that condition?

Either way, good luck with them.

ETA Mandatory gratuitous Daewoo pic.

Posted: 8/29/2017 2:15:55 AM EDT

[#26]

I call dibs before Miami_JBT! Send them to me for disposal, they are obviously beyond repair.

Posted: 8/29/2017 2:49:01 AM EDT

[#27]

Take them off, them soak in vinegar. It wipes right off.

Posted: 8/29/2017 10:19:00 AM EDT

[#28]

Quote History

Quoted:
This shit actually works, and safe.

http://www.homedepot.com/catalog/productImages/1000/92/927e528b-6531-4472-a3b4-2a3821bf048c_1000.jpg

Home Depot

View Quote

That is pretty close to "Metal Rescue"

Posted: 8/29/2017 11:26:13 PM EDT

[#29]

Quote History

Quoted:
Nothing much else to add to what's already been stated but I would for sure remove the gas blocks before treating them.

I have a K-2 and love it.

Since these rifles tend to be hard to find I'm curious as to how you came by yours and how they got in that condition?

Either way, good luck with them.

ETA Mandatory gratuitous Daewoo pic.

https://www.ar15.com/media/mediaFiles/25872/IMG_9694__1024x688_-280351.jpg

View Quote

Nice rifles, PM sent.

Posted: 8/29/2017 11:29:07 PM EDT

[#30]

What a shame someone let that happen to those rifles. Someday......someday

Posted: 8/29/2017 11:37:32 PM EDT

[#31]

Dude!

Just admit they be rusted!

camara flash is not inflating that issue!

nice score otherwise!

Posted: 8/29/2017 11:41:58 PM EDT

[#32]

Quote History

Quoted:
What a shame someone let that happen to those rifles. Someday......someday

View Quote

See stuff like that fairly often when I get called at work to buy out estates
You'd be amazed what just sitting in damp basement for a few years will do many times people will drape or wrap rags over the muzzles or other parts to "protect" them and you'll get what ya see in the OP

Posted: 8/29/2017 11:53:58 PM EDT

[#33]

Wire brush and then try sticking the ends into one of the cheap spark plug cleaners from northern tool / harbor freight. Just an idea that popped up.

Posted: 8/30/2017 12:35:35 AM EDT

[#34]

Just scrub the shit out of them with CLP and a stiff brush. Might clean up way faster and easier than you expect.

Posted: 8/30/2017 1:59:55 AM EDT

[#35]

Quote History

Quoted:

Nice rifles, PM sent.

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Thanks, and thank you for the pm as well. I look forward to seeing the "after" pics of your rifles when you're done with them.

Posted: 8/30/2017 2:16:20 AM EDT

[#36]

That much rust? Are they steel? If so, they were never neutralized after the bluing tank.

Posted: 8/30/2017 2:16:50 AM EDT

[#37]

I'd hit it with a distilled water with dissolved baking soda in it.

Posted: 8/30/2017 3:12:36 AM EDT

[#38]

I've used Evapo-Rust on auto parts before, it worked awesomely. I believe the instructions said you can soak a rag/paper towel with the product and lay it over a rusted area. I'd hit what I could with a wire brush, then tightly wrap a dripping wet (with Evapo-Rust) rag around the blocks for a day or so, perhaps repeating the process a few times.

Posted: 8/30/2017 8:37:53 PM EDT

[#39]

Quote History

Quoted:
Dude!

Just admit they be rusted!

camara flash is not inflating that issue!

nice score otherwise!

View Quote

I KNOW the rust is bad and they're rusted. It's bad enough and on a rare enough gun that I'm asking a public forum for help.

All I was trying to point out is that the flash makes the rust POP making it seem like the entire part is made from rust, when in person I can see that it's not unsalvageable.

Posted: 8/30/2017 8:40:47 PM EDT

[#40]

Quote History

Quoted:
I've used Evapo-Rust on auto parts before, it worked awesomely. I believe the instructions said you can soak a rag/paper towel with the product and lay it over a rusted area. I'd hit what I could with a wire brush, then tightly wrap a dripping wet (with Evapo-Rust) rag around the blocks for a day or so, perhaps repeating the process a few times.

View Quote

The rag is a good idea!

I was concerned about it hurting something like the chrome lining in the barrel if I just dunked it in a bucket but the rag would avoid that. I think hitting it with a wire brush first then going to the evapo-rust may be what I try first.