Originally Posted by Northern 4Runner

In my years of experience here in Nova Scotia, remove lose paint/rust and spray fluid film (I use rust check or krown). The fluid film will absorb into the now porous frame and stop the rust and prevent further rust as long as fluid film is on the frame. Which mean re apply annually, and when I hear people saying pressure wash the undercarriage throughout the winter I cringe because that just rinses off fluid film and forces nice hot water with salt into areas it normally would not enter. Washing in the spring is another solution, after winter and before next falls reapplication of fluid film

My $0.02

Originally Posted by shahsmerdis

how does your frame look now? Just curious, post up pics never enough of properly treated frames and there aftermath!

Originally Posted by Dalko43

Hello all. I bought a used 2011 (~ 33k miles) 5th Gen 4runner Trail for about $27k (before taxes) about a month ago. The 4runner I think was bought for a decent deal; no nav, has sunroof, base seats, ect. but everything looked to be in good shape and runs fine.


The one thing that concerned me slightly was the rust on the undercarriage/frame. This 4runner was bought in upstate NY, so rust is going to happen. I was aware of it before I made the purchase, so this not a surprise to me, but I was intending to clean up the underside and rust-proof, as much as possible, the vehicle. Here is what I am dealing with:




My question: What options do I have for cleaning off this rust and preventing rust in the future? Anyone have any recommendations for products/ procedures that worked well for them? Please note that I had the flash on, so the rust parts were highlighted somewhat; they stand out more in these pictures than they do in real life.

I am realistic on this. I realize I won't get all the rust off, and I realize that eventually more rust will get on there (this is the Northeast after all).

Originally Posted by EEEliminator

On the Classic car forums there is a product called POR-15 by the Eastwood Company, it is meant to be Painted Over Rust and stop it. Might be worth looking into I haven't used it myself but from what I've read it is a pretty reputable product. Don't get it on your skin though, from what I've read it'll be there until you shed that layer of skin