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best way to knock off undercarriage rust

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Old 07-31-2015, 08:03 AM   #1
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Default best way to knock off undercarriage rust

so this truck sat for 4 years before i bought it. the undercarriage has a lot of (non structure threatening) rust. been going at it with a brass wire brush but its slow and dont work too well. what would be the best way to get the rust off and treat it?
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Old 07-31-2015, 12:22 PM   #2
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I use a round wire brush on a electric drill. You have the right idea just need to add some help to it. haha
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Old 07-31-2015, 06:29 PM   #3
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Use a wire brush or wire wheel to knock most of it off. Then use a rust converter and spray it all.

Use this stuff. We sell it to a bunch of it to body shops and it works very well.
Amazon.com: Mar-Hyde - One-Step Rust Converter Primer Sealer, 10 oz. aerosol (3509): Automotive Amazon.com: Mar-Hyde - One-Step Rust Converter Primer Sealer, 10 oz. aerosol (3509): Automotive

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Old 08-01-2015, 10:04 PM   #4
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Not sure about where you live, but around here (West Virginia) that's just normal. If your vehicle is over 15 years old and the frame isn't toast, then it's a miracle. I think I'm going to start working on mine here pretty soon. Maybe just knock off the real heavy, loose stuff with a wire brush and then spray it down with some penetrating oil. Keep applying penetrating oil a few times and it will dissolve the rust. Then, maybe go over it with some grease or clean it up and use the stuff Crownman posted.
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Old 08-01-2015, 10:49 PM   #5
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Try one of these, like I think Restof150s is suggesting.

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Old 08-01-2015, 10:51 PM   #6
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If you use something like Por15, you don't have to (and shouldn't) take all the rust off, just brush off any large/loose chunks. It bonds best to rust, and stops it from getting worse.
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Old Yesterday, 01:04 AM   #7
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Harbor Freight needle scaler.
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Old Yesterday, 01:28 PM   #8
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Eagle One Etching Mag Wheel Cleaner! Very good stuff. It's an acid and it may take a couple of treatments, but you'll love the results. Just did the exhaust and frame on my new to me truck. Looks brand new! I then coat with WD40. I don't live near salt water and our DOT uses sand in the winter. You can use it on the radiator and trans and oil coolers. 30 seconds max on copper parts. Have your water hose ready to rinse thoroughly. It will improve cooling on old cooling system parts. Allot of uses!
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Old Yesterday, 01:28 PM
 
 
 
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