Undercarriage minor rust preventive action

[Returntothefog]

Hello all, found a couple spots with very minor rust spots (trailing arm brackets looks like snagged on something when wheeling and looks more concerning.)
Spent my time between California Bay Area and Central Valley, salt isn’t an issue really.
Any preventive action I should take?
Thought about taking a steel wire brush to it then put on some rustolems but not sure what the correct thing to do is.

Thanks!

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[MilesTeg]

It's no longer just surface corrosion, but actual rust (e.g. flaking). You should first put on some PPE, then your wire brush and maybe some sandpaper, then a rust converter, then underbody paint.

But, it's also really not that much so YMMV.

 

[mjp2]

I've been annually coating everything in a lanolin based rust prevention treatment. (Fluid Film, Wool Wax, Corrosion Free, etc.). It makes a huge difference.

I recently tried Blaster Surface Shield and it's my current favorite. It's also pretty affordable when bought by the 5 gallon tub. If you've got an air compressor you've already covered the expensive part of the application system.

Anecdotally, I just had one of my trucks aligned literally today and apologized to the tech for all the tool clean up he needed to do when he was done. "I'll take that over fighting rusted parts any day! Everything on your truck actually moves!"

That's on a 2010 Ford Expedition with 215k miles. It's an annoyingly messy hour once a year but the results are definitely worth it.

 

[Returntothefog]

I've been annually coating everything in a lanolin based rust prevention treatment. (Fluid Film, Wool Wax, Corrosion Free, etc.). It makes a huge difference.

I recently tried Blaster Surface Shield and it's my current favorite. It's also pretty affordable when bought by the 5 gallon tub. If you've got an air compressor you've already covered the expensive part of the application system.

Anecdotally, I just had one of my trucks aligned literally today and apologized to the tech for all the tool clean up he needed to do when he was done. "I'll take that over fighting rusted parts any day! Everything on your truck actually moves!"

That's on a 2010 Ford Expedition with 215k miles. It's an annoyingly messy hour once a year but the results are definitely worth it.

Sounds overkill, I like it. Can you divulge more on the process?

 

[mjp2]

Sounds overkill, I like it. Can you divulge more on the process?

Turn on the big air compressor and break out some breakdance-size pieces of cardboard. Dress in old clothes, lay the cardboard down under the truck, protect your face, and get to spraying everything that's not the exhaust.

Honestly, that's pretty much the deal. For nooks, crannies, and tiny openings in the doors, bumpers, frame, etc. I use a long thin wand that sprays out in a 360 degree pattern so the insides of everything gets coated. Otherwise application is via a spray gun made just for this stuff. I'm partial to the WoolWax applicator kit because it's really complete.

I even treat the underside of our travel trailer with the stuff and it keeps the frame and metal components looking brand new.

When you're done wash those clothes separate from anything else. The lanolin will get onto whatever it's washed with so you'll end up with clothes set aside just for undercoating day

 

[Big Betty Blue]

Find a garage that will get it off with dry ice and that will apply WaxOyl after. There's a garage in Ohio that shows info on this https://www.facebook.com/PierresGarage

 

[NC_Oak]

this is very much not concerning but I get you want to fix it. I have a few spots from wheeling that happen every year and I have some to fix this off season.

That looks well adhered, but flaking paint needs to be knocked down. Wirewheel, sandpaper, grinder, brush, anything will work., light effort. POR-15 works well, or corroseal then a top coat.

 

[Iceman62]

There are chemicals to reverse rust/oxidation...here are before/after pics of my recent Mustang treatment at local shop:

Apologies for the last pic being small (they took), but the car looks like it just rolled off the assy line.

 

[MilesTeg]

There are chemicals to reverse rust/oxidation...here are before/after pics of my recent Mustang treatment at local shop:

Note: it doesn't "reverse" rust. They chemically convert the iron oxide into a more stable compound (which compound depends on which chemical) that then protects from further oxidization. It does a good job of stopping the rust, but you don't get steel back.

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