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Metal Rescue vs Acid Bath

#1 2019-12-10 9:03pm

Bill_OBrien
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Metal Rescue vs Acid Bath

I wanted to de-rust my 1983 Mongoose Frame / Forks / Cranks / Kashimax Seat Guts.

I have used Metal Rescue a fair amount on auto restoration projects but never tried the oxalic acid bath.

The big downside of Metal Rescue is the price.. about $25 for a gallon vs minimal cost for the acid.

I did a fair amount of research on here about the acid bath and decided to try it. I soaked the frame / forks / cranks in a large storage tub over the summer in 90 degree heat.

I did get to the point where I was developing the yellow coating and rust was being 'eaten'. I would rub the yellow stuff off occasionally and then re-soak the parts. It took a very long time.... the yellow substance kept forming on parts that had relatively minor rust.

I got to the point about a week in where I had had it and there was still yellow coating being formed. I decided to stop the acid bath.

Then I had the issue where in some areas the yellow coating would not come off.


What I decided to do was go back to a Metal Rescue soak.

My issue was I did not want to fill a tub with $25 per gallon Metal Rescue!!!

What I decided to do was to take a piece of plywood, put two 2x4's parallel loose on top of the plywood and put a thick industrial garbage bag on top of the 2x4's creating a 'pool' area. I put the section of the bike frame I wanted to soak in the pool area and rolled the garbage bag at the ends in between the 2x4's and the secured the garbage bag with a staple gun to the 2x4's.

I poured in the requisite amount of Metal Rescue and let the frame soak. It worked amazingly well. All of the yellow residue and and rust was gone in a short amount of time. I also did this with the forks and the seat guts. All came out great.

Thoughts on Metal Rescue:

Pros - Non hazardous (no gloves required), No yellow residue to rub off or remove, Works quickly, Rust is gone, Can be reused if it is not too black.

Con - Price (can be mitigated by area specific soaking), Can leave a black film if parts are left in too long

I just wanted to share my experience and thoughts. I may not have done the acid bath correctly as I saw some amazing results that others have had.

Pics to follow....


1983 Mongoose - Undergoing restoration.
1981 PK Ripper Build - White powder coated Building a blue / white 2013 Retro Looptail
1983 PK Ripper - (No Longer Owned) Bought new as a kid. Burnished aluminum frame / blue decals / blue alloy rims.
1983 Pk Ripper Frame / Fork - Fork is mint chrome - Frame is restored bare aluminum
2007 PK Ripper Looptail Retro Anniversary Edition Build

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#2 2019-12-10 9:09pm

psychoduddycycles
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Re: Metal Rescue vs Acid Bath

IDK the specifics on your operation but, OA should take a day at most. Not a week. That said, I'd be concerned you ruined the inside of the frame leaving it in water that long.


Sometimes, to make a paradise, you gotta release a SERPENT.

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#3 2019-12-10 9:09pm

Bill_OBrien
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Re: Metal Rescue vs Acid Bath

https://s3.amazonaws.com/uploads.bmxmuseum.com/user-images/259119/17508d41-0a16-4bfe-a81e-a6aa6a99617f5df07a0eb0.jpeg
https://s3.amazonaws.com/uploads.bmxmuseum.com/user-images/259119/11eaa726-bd1b-4306-bdc3-1d0f05ea5b2d5df07a2068.jpeg
https://s3.amazonaws.com/uploads.bmxmuseum.com/user-images/259119/b8f988ea-b05e-4253-958e-7bb1e98325be5df07a19b1.jpeg


1983 Mongoose - Undergoing restoration.
1981 PK Ripper Build - White powder coated Building a blue / white 2013 Retro Looptail
1983 PK Ripper - (No Longer Owned) Bought new as a kid. Burnished aluminum frame / blue decals / blue alloy rims.
1983 Pk Ripper Frame / Fork - Fork is mint chrome - Frame is restored bare aluminum
2007 PK Ripper Looptail Retro Anniversary Edition Build

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#4 2019-12-10 9:12pm

Bill_OBrien
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Re: Metal Rescue vs Acid Bath

https://s3.amazonaws.com/uploads.bmxmuseum.com/user-images/259119/bfb01cbe-e538-4cdc-ba74-0c9fdcad431c5df07ab66a.jpeg
https://s3.amazonaws.com/uploads.bmxmuseum.com/user-images/259119/dcc7b05a-8a5b-468f-944f-558400ef74e85df07ab60a.jpeg
https://s3.amazonaws.com/uploads.bmxmuseum.com/user-images/259119/94f775e4-02e1-4240-99ea-f1fd044ac0975df07aae8d.jpeg


1983 Mongoose - Undergoing restoration.
1981 PK Ripper Build - White powder coated Building a blue / white 2013 Retro Looptail
1983 PK Ripper - (No Longer Owned) Bought new as a kid. Burnished aluminum frame / blue decals / blue alloy rims.
1983 Pk Ripper Frame / Fork - Fork is mint chrome - Frame is restored bare aluminum
2007 PK Ripper Looptail Retro Anniversary Edition Build

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#5 2019-12-10 9:14pm

Bill_OBrien
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Re: Metal Rescue vs Acid Bath

https://s3.amazonaws.com/uploads.bmxmuseum.com/user-images/259119/e7e0efe1-4107-49ba-8117-b41a3874eaac5df07b32c6.jpeg


1983 Mongoose - Undergoing restoration.
1981 PK Ripper Build - White powder coated Building a blue / white 2013 Retro Looptail
1983 PK Ripper - (No Longer Owned) Bought new as a kid. Burnished aluminum frame / blue decals / blue alloy rims.
1983 Pk Ripper Frame / Fork - Fork is mint chrome - Frame is restored bare aluminum
2007 PK Ripper Looptail Retro Anniversary Edition Build

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#6 2019-12-10 9:20pm

Bill_OBrien
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Re: Metal Rescue vs Acid Bath

psychoduddycycles wrote:

I'd be concerned you ruined the inside of the frame leaving it in water that long.

From where I can see into the tubes they look really clean after the Metal Rescue bath... no worries there.


1983 Mongoose - Undergoing restoration.
1981 PK Ripper Build - White powder coated Building a blue / white 2013 Retro Looptail
1983 PK Ripper - (No Longer Owned) Bought new as a kid. Burnished aluminum frame / blue decals / blue alloy rims.
1983 Pk Ripper Frame / Fork - Fork is mint chrome - Frame is restored bare aluminum
2007 PK Ripper Looptail Retro Anniversary Edition Build

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#7 2019-12-10 9:39pm

Kurt_Rad
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Re: Metal Rescue vs Acid Bath

I’m an advocate of citric personally


[img]https://s3.amazonaws.com/uploads.bmxmuseum.com/user-images/56126/9d4c6707-718c-4ec3-9aeb-aef1bc82caa95c467c81b65e1d4b4d05.jpg[/img]

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#8 2019-12-11 4:48am

RobS
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Re: Metal Rescue vs Acid Bath

Wheres the before pics?

Last edited by RobS (2019-12-11 4:48am)


Good things wait for people that happen...

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#9 2019-12-11 9:30am

QueensFinest72
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Re: Metal Rescue vs Acid Bath

Before pics would've been nice.

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#10 2019-12-11 9:35am

QueensFinest72
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Re: Metal Rescue vs Acid Bath

I've been using this for quite some time now and the results are unbelievable. Removes rust like magic. Safe on all finishes... https://s3.amazonaws.com/uploads.bmxmuseum.com/user-images/259631/screenshot_20191211-1232085df128c50b.jpg

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#11 2019-12-11 1:40pm

robk131313
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Re: Metal Rescue vs Acid Bath

QueensFinest72 wrote:

I've been using this for quite some time now and the results are unbelievable. Removes rust like magic. Safe on all finishes... https://s3.amazonaws.com/uploads.bmxmuseum.com/user-image … 28c50b.jpg

+1
Good stuff.

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#12 2019-12-12 1:51pm

boogiedj
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Re: Metal Rescue vs Acid Bath

The biggest downside to using Metal Rescue is the SMELL. God forbid you get it on anything, or use it indoors. It may be non-toxic, but the residue and fumes left over from doing its "magic" will take months to finally go away. Any drop cloths you use will absorb the smell. I've done both, and for the price the oxalic bath is the better play. You basically get the same results. Just depends on your patience level.

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#13 2019-12-12 3:55pm

MAIDEN GT fan
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Re: Metal Rescue vs Acid Bath

I Noticed ALOT Of Guys Wanted To Keep OG Decals And OA/CA Don't Ruin Decals(For The Most Part). cool

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#14 2019-12-12 6:29pm

Bmx4fun1980
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Re: Metal Rescue vs Acid Bath

cool thanks for sharing

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#15 2019-12-12 6:31pm

eric12
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Re: Metal Rescue vs Acid Bath

Kurt_Rad wrote:

I’m an advocate of citric personally

+1

CAP is the stuff to use.


You can't put a price on peace of mind.

This too shall pass.

Use common sense. Or cents for most.

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#16 2019-12-12 6:35pm

QueensFinest72
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Re: Metal Rescue vs Acid Bath

eric12 wrote:

Kurt_Rad wrote:

I’m an advocate of citric personally

+1

CAP is the stuff to use.

What's the ratio? And how long? I've been wanting to give a try for larger pieces like a frame. Thanks.

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#17 2019-12-12 6:41pm

eric12
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From: M'Boro, TN
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Re: Metal Rescue vs Acid Bath

QueensFinest72 wrote:

eric12 wrote:

Kurt_Rad wrote:

I’m an advocate of citric personally

+1

CAP is the stuff to use.

What's the ratio? And how long? I've been wanting to give a try for larger pieces like a frame. Thanks.

https://bmxmuseum.com/forums/viewtopic.php?id=121049

I up it to around 8oz per gallon though.

Last edited by eric12 (2019-12-12 6:43pm)


You can't put a price on peace of mind.

This too shall pass.

Use common sense. Or cents for most.

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#18 2019-12-12 6:45pm

QueensFinest72
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From: New York City
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Re: Metal Rescue vs Acid Bath

eric12 wrote:

QueensFinest72 wrote:

eric12 wrote:


+1

CAP is the stuff to use.

What's the ratio? And how long? I've been wanting to give a try for larger pieces like a frame. Thanks.

https://bmxmuseum.com/forums/viewtopic.php?id=121049

I up it to around 8oz per gallon though.

Thank you for the link big_smile

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#19 2019-12-12 6:47pm

Bill_OBrien
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Re: Metal Rescue vs Acid Bath

boogiedj wrote:

The biggest downside to using Metal Rescue is the SMELL. God forbid you get it on anything, or use it indoors. It may be non-toxic, but the residue and fumes left over from doing its "magic" will take months to finally go away. Any drop cloths you use will absorb the smell. I've done both, and for the price the oxalic bath is the better play. You basically get the same results. Just depends on your patience level.

I haven’t experienced any smell with non oily parts in using Metal Rescue 20+ times.

I do agree if there is oil or PB Blaster on the parts it does get a bit of a smell.

Last edited by Bill_OBrien (2020-07-09 6:36pm)


1983 Mongoose - Undergoing restoration.
1981 PK Ripper Build - White powder coated Building a blue / white 2013 Retro Looptail
1983 PK Ripper - (No Longer Owned) Bought new as a kid. Burnished aluminum frame / blue decals / blue alloy rims.
1983 Pk Ripper Frame / Fork - Fork is mint chrome - Frame is restored bare aluminum
2007 PK Ripper Looptail Retro Anniversary Edition Build

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#20 2019-12-12 8:03pm

Indyjps
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Re: Metal Rescue vs Acid Bath

Always wondered how OA or CAP would effect nickel plating as opposed to chrome.  Is your mongoose nickel?

OA fan here,  about out of it and have some CAP on hand to try.


MTNBKSUK

Location: Chicago Burbs

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#21 2019-12-12 11:05pm

1979
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Re: Metal Rescue vs Acid Bath

I don't know about  nickel but if you're going to use OA or Cap on your  frames and forks flush the insides out many times. Soapy water to neutralize  the oa/cap. Spray them with a penetrating oil like PB blaster on the inside tubes. May look  better on the outside but those chemicals on the inside can do some damage


It's yours. Do what you want with it smile

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#22 2020-07-05 4:22am

like2pic
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Re: Metal Rescue vs Acid Bath

Bill, your frame looks good! I’m still on the fence even now. I just want to do some small parts from a G3 Gyro, Crank Arms (pedals) and Seat guts. Not trying to jack your thread Bill, just trying to keep the knowledge flowing. Anyone?

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#23 2020-07-05 4:36pm

Indyjps
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Re: Metal Rescue vs Acid Bath

Evaporust is great,  I also use it for auto resto,  cost of using it for bike frame isnt worth it to me.   Small parts maybe,  oxalic is easy and once you buy it the tub lasts a long time.

One tip on any acid bath, keep some gallon and half gallon jugs around, fill with water and set them in the bath around the frame tubes to take up space and use less chemicals.

I also use phosporic for auto resto, etching rusted areas after wire wheeling or blasting.  Stay away from muratic - nasty shlt.   Reverse electrolysis, molasses, I've tried them all.


MTNBKSUK

Location: Chicago Burbs

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#24 2020-07-09 6:38pm

Bill_OBrien
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Re: Metal Rescue vs Acid Bath

like2pic wrote:

Bill, your frame looks good! I’m still on the fence even now. I just want to do some small parts from a G3 Gyro, Crank Arms (pedals) and Seat guts. Not trying to jack your thread Bill, just trying to keep the knowledge flowing. Anyone?

Metal Rescue works really well for small stuff.

I had high hopes with the acid. It kept producing the yellow substance and it was hard to get the yellow off. And I did it for a loooong time. Also, there was still rust.

I took the parts put them in Metal Rescue and the rust and yellow stuff was gone!


1983 Mongoose - Undergoing restoration.
1981 PK Ripper Build - White powder coated Building a blue / white 2013 Retro Looptail
1983 PK Ripper - (No Longer Owned) Bought new as a kid. Burnished aluminum frame / blue decals / blue alloy rims.
1983 Pk Ripper Frame / Fork - Fork is mint chrome - Frame is restored bare aluminum
2007 PK Ripper Looptail Retro Anniversary Edition Build

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#25 2020-07-09 6:50pm

QueensFinest72
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Re: Metal Rescue vs Acid Bath

Metal rescue/Evaporust is hands down the most effective rust remover I've used. only downside is that it's way expensive for the bigger parts like complete frames.

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