Rust treatment before oil spray?

2

Sand blast it

2

Sandblast and hit it with POR15. You’ll never look back.

2

You don’t need to do any surface preparation for Krown or Rust Check. They use a thin, oil-based formula which penetrates the rust and covers the metal underneath. If you want to prep it then go ahead. Paint will flake off when the rust gets under it. Before you apply anti-rust spray, remove all of your skid plates and spare tire for better coverage. There’s also a small protective cover plate on the outside of the left frame rail, about where the driver’s door and rear door meet. The flange nuts underneath rust quickly so remove the cover. Do it now when it’s warm. Hot weather helps the oil to seep into joints and crevices, and provides better coverage.

1

u/scorp171 25d ago

I got this 2010 4Runner around a month back with just 126k miles (202K Km) here in Canada. It only had this surface rust. Confirmed no chipping of metal, and got the undercarriage tested by my mechanic as well.

I wanted to get this treated well before the winter arrives. After going through the posts, I found oil spray (Krown) seems to be the best suggested way to maintain the rust proofing over time.

However, do you guys recommend getting this corrected before the oil spray? I saw videos of people using metal wire to get rid of surface rust and using rustoleum coating. I do not plan to do any black rubber coating as I've seen it further increases the rust over time.

Recommendations?

2

u/Symun_Ano 24d ago edited 24d ago

Check out my 2010 from eastern Ontario… I scraped and rust converted it last fall. Before and after one winter:

https://www.reddit.com/r/4Runner/comments/lw0za0/salty_first_winter_after_resurfacing_the/?utm_source=share&utm_medium=ios_app&utm_name=iossmf

My recommendation : clean it up first. Don’t use rubber. I wanted to see how it responded to one year without before getting it oiled. I’m glad cuz now I can re-surface the trouble areas before oil this year