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75 highboy frame treatment

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Old Apr 8, 2024 | 05:32 PM
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75 highboy frame treatment

Hello - I picked up a solid, very little surface rust F26 rolling chassis.

I noticed a few uneven areas here and there. It was obvious prior owners treated it with something, chassis saver, etc. I figured I’d run a stripping wheel to smooth everything down as I intend to treat with a rubberized undercoating as I can get to every nook and corner.

Anyhow while grinding this stuff it acts like a very thick tar, smells like a refinery and basically knocks down but spreads too. Only if I hold the wheel in one area for a minute or so will I get to bare metal. Anyone have an idea what it could be?

Guy I picked it up from basically was passing it on. He didn’t do anything with it prior so he didn’t know.

TYIA

Kind of tell in this picture



 
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Old Apr 8, 2024 | 07:08 PM
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That’s probably the rubberized undercoating you’re planning to put back on there. My opinion? Use POR-15 or another agent that chemically bonds to the metal. Follow their instructions explicitly and it will last you a lifetime. Undercoating can actually cause rust to worsen over time as it cracks and separates from the metal thus allowing moisture to intrude and then get trapped. We have much better options these days.
 
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Old Apr 8, 2024 | 07:22 PM
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Originally Posted by Viper Pilot
That’s probably the rubberized undercoating you’re planning to put back on there. My opinion? Use POR-15 or another agent that chemically bonds to the metal. Follow their instructions explicitly and it will last you a lifetime. Undercoating can actually cause rust to worsen over time as it cracks and separates from the metal thus allowing moisture to intrude and then get trapped. We have much better options these days.
I am treating it with a rust encapsulator first. I was dead set on Chassis Saver until I came across the Rust Oleum Pro Undercoating. The end result is much better looking. I agree with you though, if you can’t create one membrane with the undercoating it’s a time bomb. I’m in Idaho, not terribly worried about rust. Only rigs that rust out here have lived a hard life around fertilizer and pesticides.

I was wondering it it was a rubber compound of some sort, you’re probably right. Definitely not applied the same way as I’m planning.
 
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Old Apr 8, 2024 | 07:43 PM
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Best of luck on what you decide to do. Post pictures when you’re finished.
 
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Old Apr 9, 2024 | 08:46 AM
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i saw eastwood has a sale on their surface conditioner right now for $100. i think i'd try that with the paint wheel remover on something like that. I think it would be quicker than a grinder too because it would be a nice wide 4" abrasion wheel. one of those orange citrus paint stripper gels might not be a bad thing to try either.
 
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Old Apr 9, 2024 | 09:05 AM
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Originally Posted by uzikaduzi
i saw eastwood has a sale on their surface conditioner right now for $100. i think i'd try that with the paint wheel remover on something like that. I think it would be quicker than a grinder too because it would be a nice wide 4" abrasion wheel. one of those orange citrus paint stripper gels might not be a bad thing to try either.
You think it would be better to remove everything? I’ve ground down what little rust flaking there was. I was going for a smooth surface before applying the rubber undercoating. Lacquer thinner seamed to work on it too but figured rubber over rubber (if it was prior undercoating) would be fine? 🤷🏼‍♂️
 
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Old Apr 9, 2024 | 09:41 AM
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Originally Posted by jdub1177
You think it would be better to remove everything? I’ve ground down what little rust flaking there was. I was going for a smooth surface before applying the rubber undercoating. Lacquer thinner seamed to work on it too but figured rubber over rubber (if it was prior undercoating) would be fine? 🤷🏼‍♂️

i honestly have no idea, but i'm uncomfortable applying things over substances when i'm not sure what that substance is and i'm hoping to never have to do it again. looks like you've put a ton of work into this and i'd personally be pretty upset to put a ton of work in and have whatever i did fail over a couple of years.

i'm sure that's on the extreme side of how quickly it might fail (if it ever fails?)
 
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Old Apr 9, 2024 | 09:59 AM
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Originally Posted by uzikaduzi
i honestly have no idea, but i'm uncomfortable applying things over substances when i'm not sure what that substance is and i'm hoping to never have to do it again. looks like you've put a ton of work into this and i'd personally be pretty upset to put a ton of work in and have whatever i did fail over a couple of years.

i'm sure that's on the extreme side of how quickly it might fail (if it ever fails?)
You’re probably right. Who had that conditioner for $100? I found it for $159, every dollar counts with this project. Haha
 
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Old Apr 9, 2024 | 12:11 PM
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i was getting ads on facebook last week for it being discounted on eastwood's website for 99, but i see it's not anymore. I know the harbor freight bauer version is frequently 109 with their membership (but it also doesn't appear to be on sale right now either)

i want to buy one, but everytime i go to pull the trigger it's not on sale lol.
 
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