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Your right...steel corrode... but s I does aluminum.Vehicles last for decades up in the rust belt. The biggest issue is rusty steel body panels. Not an issue with aluminum body panels.
I would just give your Raptor a good cleaning, then forget about it.
The truck will last many, many years.
You're vastly overthinking it. This is what my winter Porsche looks like for 4-5 months per year, and it still looks like new underneath. This isn't the '70s.
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Some of ya'll are pretty funny.
Seriously though, thank you for addressing my question and easing my concerns. I am someone who will overthink things like this, so the reassurance and information really helps. Like I said, I have zero experience with caring for vehicles driven on salty roads.
I ended up washing the entire truck after taking care of business earlier in the day. It took me about 8 hours.
I washed the bottom of the truck four times to try and cover everything: once with power washer only, then foam cannon and power washer again, then with handheld hose/soap sprayer to reach hard to reach places, and finally used a ryobi water broom to spray the undercarriage. (not that effective) I used a scrub brush to agitate areas where it seemed to have more build up. I still don't think it's as clean as it could be.
After everything dried, there appears to be a lot of areas with rust. However, based on the info in this thread, I assume this to be normal. While I was under there, I also noticed a piece of insulation (?) that appears to be loose. Maybe someone on here knows what it is. I'll add a link to a page with pictures below.
Rust Example:
The Truck:
All of the rust pics from the undercarriage: https://imgur.com/a/i1sllfw
I had the same surface rust issue. I used Corroseal Rust Converter. It turns to black. Still looks great.
I'll check it out. Is this an alternative to Fluid Film? Or do you use both?